free your box
Tuesday February 9th 2010

TiVo

TiVo (pronounced /ˈtiːvoʊ/) is a pioneer of the digital video recorder (DVR). TiVo was introduced in the United States, and is now available in Canada, Mexico, Australia, Taiwan, and the UK. TiVo DVRs provide an electronic television programming schedule, and provide features such as Season Pass recordings (which ensure subscribers never miss an episode of their favorite shows) and WishList searches (which allow the user to find and record shows that match their interests by title, actor, director, category or keyword). TiVo also provides a range of features when the TiVo DVR is connected to a home network, including movie and TV show downloads, advanced search, personal photo viewing, music offerings, and online scheduling.

History and development

TiVo was developed by Jim Barton and Mike Ramsay through a corporation they named Teleworld which was later renamed to Tivo, Inc. Originally intending to create a home network device, it morphed into a device which records digitized video onto a hard disk. They began the first public trials of the TiVo device and service in late 1998 in the San Francisco Bay Area.

After exhibiting at the Consumer Electronics Show in January 1999, Mike Ramsay announced to the company that the first version of the TiVo digital video recorder would ship on March 31, 1999, despite an estimated four to five months of work remaining to complete the device. Because March 31, 1999 was a blue moon, the engineering staff code named this first version of the TiVo DVR “Blue Moon”.[1]

The original TiVo DVR digitized and compressed analog video from any source (antenna, cable or direct broadcast satellite). In late 2000, Philips Electronics introduced the DSR6000, the first DirectTV receiver with an integrated TiVo DVR. This new device, nicknamed the “DirecTiVo,” stored digital signals sent from DirectTV directly onto a hard disk. In early 2000, TiVo partnered with electronics manufacturer Thomson Multimedia and broadcaster British Sky Broadcasting to deliver the TiVo service in the UK market. This partnership resulted in the Thomson PVR10UK, a stand-alone receiver released in October 2000 that was based on the original reference design used in the United States by both Philips and Sony. TiVo ended UK unit sales in January 2003, though it continues to sell subscriptions and supply guide data to existing subscribed units. TiVo also integrates its DVR service into the set-top boxes of satellite and cable providers.

TiVo was launched in Australia in July 2008 by Hybrid Television Services, a company owned by Australia’s Seven Media Group and New Zealand’s TVNZ. TiVo will go on sale in New Zealand in the first week of November 2009.[2]

TiVo Digital Video Recorder

Front view of a TiVo Series2 5xx-generation unit

Back view of a TiVo Series2 5xx-generation unit

A TiVo DVR serves a function similar to a videocassette recorder, in that both allow a television viewer to record programming for viewing at a later time. Unlike a VCR, which uses removable magnetic tape cartridges, a TiVo DVR stores television programs onto non-removable hard disk storage. Also, the TiVo device does not have any buttons on the front panel; its functions are solely controlled by remote control.

What distinguishes TiVo from other DVRs is the sophisticated software written by TiVo Inc. that automatically records programs—not only those the user specifically requests, but also other material the user is likely to be interested in. TiVo DVRs also implement a patented feature TiVo calls “trick play,” which allows the viewer to pause live television, and rewind and replay up to a half hour of recently viewed television. More recent TiVo DVRs can be connected to a computer local area network, which allows the TiVo device to download information and even video programs, music and movies from the Internet.

Functions

TiVo polls its network, receiving program information including description, regular and guest actors, directors, genres, whether programs are new or repeats, and whether broadcast is in HD. Information is updated daily from Tribune Media Services.

Users can select individual programs to record or a “Season Pass” to record an entire season (or more). There are options to record First Run Only, First Run & Repeats, or All Episodes. An episode is considered “First Run” if aired in two weeks of the original air date.

When user requests for multiple programs are conflicting, the lower priority program in the Season Pass Manager is either not recorded or clipped where times overlap. The lower priority program will be recorded if it is aired later. TiVo DVRs with two tuners record the top two priority programs.

A user rating a program

TiVo pioneered recording programs based on household viewing habits;[citation needed] this is called TiVo Suggestions. Users can rate programs from three “thumbs up” to three “thumbs down.” TiVo user ratings are combined to create a recommendation, based on what TiVo users with similar viewing habits watch. For example, if a user likes The Simpsons, Family Guy and Futurama, then another TiVo user who watched just the The Simpsons might get a recommendation for the other two shows.

A limited amount of space is available to store programs. When the space is full, the oldest programs are deleted to make space for the newer ones; programs that users flag to not be deleted are kept and TiVo Suggestions are always lowest priority. The recording capacity of a TiVo HD DVR can be expanded with an external hard drive, which can add 65 additional hours of HD recording space or up to 600 hours of standard definition recording capacity.

When not recording specific user requests, the current channel is recorded for up to 30 minutes. (Dual tuner models keep two channels.) This allows users to rewind or pause anything that has been shown in the last thirty minutes: useful when viewing is interrupted. Shows already in progress can be entirely recorded if less than 30 minutes have been shown. Unlike VCRs, TiVo can record and play at the same time. A program can be watched from the beginning even if it’s in the middle of being recorded, which is something that VCRs cannot do. Some users take advantage of this by waiting 10–15 minutes after a program starts (or is replayed from a recording), so that they can fast forward through commercials. In this way, by the end of the recording viewers are caught up with live TV.

Unlike most DVRs, TiVo DVRs are easily connected to home networks,[3] allowing users to schedule recordings on TiVo’s website (via TiVo Central Online), transfer recordings between TiVo units (Multi-Room Viewing (MRV)) or to/from a home computer (TiVoToGo transfers), play music and view photos over the network, and access third-party applications written for TiVo’s Home Media Engine (HME) API.

TiVo has added a number of broadband features, including integration with Amazon Video on Demand, Jaman.com[4] and Netflix Watch Instantly[5], offering users access to thousands of movie titles & TV shows right from the comfort of their couch. Additionally, broadband connected to TiVo boxes can access digital photos from Picasa Web Albums or Photobucket. Another popular feature is access to Rhapsody music through TiVo, allowing users to listen to virtually any song from their living room. TiVo also teamed up with One True Media to give subscribers a private channel for sharing photos and video with family and friends. They can also access weather, traffic, Fandango movie listings (including ticket purchases), and music through Live365. In the summer of 2008 TiVo announced the availability of YouTube videos on TiVo.

On June 7, 2006, TiVo began offering TiVoCast, a broadband download service which initially offered content from places such as Rocketboom or, The New York Times—now there are over 70 TivoCast channels available for TiVo subscribers.

TiVo is expanding media convergence. In January 2005, TiVoToGo, a feature allowing transfer of recorded shows from TiVo boxes to PCs, was added. TiVo partnered with Sonic in the release of MyDVD 6.1, software for editing and converting TiVoToGo files. In January, 2007, TiVoToGo was extended to the Macintosh with Toast Titanium 8, Roxio software for assembly and burning digital media on CD and DVD media. Other means of manipulating files are described at the TiVoToGo Unleashed tutorial. In August 2005, TiVo rolled out “TiVo Desktop” allowing moving MPEG2 video files from PCs to TiVo for playback by DVR.

Parental Features

TiVo KidZone is designed to give parents greater control over what their children see on TV. This feature allows parents to choose which shows their children can watch and record. It also helps kids discover new shows through recommendations from leading national children’s organizations. TiVo KidZone provides a customized Now Playing List for children that displays only pre-approved shows, keeping TV as safe as possible.

Subscription service

The information that a TiVo DVR downloads regarding TV schedules as well as software updates and any other relevant information is available through a monthly service subscription in the US. A different model applies in Australia where the TiVo media device is bought for a one off fee, without further subscription costs.

Lifetime Subscription Product Lifetime Service includes a “Product Lifetime Subscription” to the TiVo service which covers the life of the TiVo DVR—not the life of the subscriber. The Product Lifetime Subscription accompanies the TiVo DVR in case of ownership transfer. TiVo makes no warranties or representations as to the expected lifetime of the TiVo DVR (aside from the manufacturer’s Limited Warranty).

Service availability

The TiVo service is available in the United States, United Kingdom, Canada (except Québec), Mexico, Australia and Taiwan at present. Over the years since its initial release in the United States, TiVo Series 1 & 2 DVRs have also been modified by end users to work in Australia, Brazil, Canada, New Zealand, the Netherlands, and South Africa.

The TiVo service was launched in the United Kingdom in the autumn of 2000. It sold only 35,000 units over the next 18 months. Thomson, makers of the only UK TiVo box, abandoned it in early 2002 after BSkyB launched its Sky+ integrated ’set-top’ decoder and DVR which dominated the market for DVRs in homes subscribing to BSkyB’s paid-for satellite TV service. Many manufacturers, including Thomson[6][7] have launched integrated decoder boxes/DVRs in the UK for other digital platforms, including free satellite, terrestrial, cable and IPTV.

Whilst TiVo is no longer on sale in the UK, the subscription service is still maintained with both lifetime and monthly subscriptions. A technical issue caused TiVo Suggestions to stop recording for Series 1 UK TiVo customers in late September 2008, but this was fixed in late January 2009.[8]

TiVo will go on sale in New Zealand in the first week of November 2009.[9]

Hardware anatomy

Main article: TiVo DVRs

The TiVo DVR was designed by TiVo Inc., which currently provides the hardware design and Linux-based TiVo software, and operates a subscription service (without which most models of TiVo will not operate). TiVo units have been manufactured by various OEMs, including Philips, Sony, Hughes, Pioneer, Toshiba, and Humax, which license the software from TiVo Inc. To date, there have been three “series” of TiVo units produced.

TiVo DVRs are based on PowerPC (Series1) or MIPS (Series2) processors connected to MPEG-2 encoder/decoder chips and high-capacity IDE/ATA hard drives. Series1 TiVo units used one or two drives of 13–60 GB; current Series2 units have drives of 40–250 GB in size. TiVo has also partnered with Western Digital to create an external hard-drive, the My DVR Expander, for TiVo HD and Series3 Boxes. It plugs into the TiVo box using an eSATA interface. It expands the High-Definition boxes by up to 67 hrs of HD, and around 300 hrs. of standard programming. Other TiVo users have found many ways to expand TiVo storage, although these methods are not supported by TiVo, and may void the warranty.

Some recent models manufactured by Toshiba, Pioneer, and Humax, under license from TiVo, contain DVD-R/RW drives. The models can transfer recordings from the built-in hard drive to DVD Video compliant disc, playable in most modern DVD systems.

All standalone TiVo DVRs have coax/RF-in and an internal cable-ready tuner, as well as analog video input—composite/RCA and S-Video—for use with an external cable box or satellite receiver. The TiVo unit can use a serial cable or IR blasters to control the external receiver. They have coax/RF, composite/RCA, and S-Video output, and the DVD systems also have component out. Audio is RCA stereo, and the DVD systems also have digital optical out.

Until 2006, standalone TiVo systems could only record one channel at a time, though a dual-tuner Series2DT (S2DT) box was introduced in April 2006. The S2DT has two internal cable-ready tuners and it supports a single external cable box or satellite receiver. The S2DT is therefore capable of recording two analog cable channels, one analog and one digital cable channel, or one analog cable and one satellite channel at a time, with the correct programming sources. Note, however, that the S2DT, unlike earlier units, cannot record from antenna. This is due to an FCC mandate that all devices sold after March 2007 with an NTSC tuner must also contain an ATSC tuner. TiVo therefore had to choose between adding ATSC support, or removing NTSC support. With the S2DT they opted to remove NTSC; the Series3 supports NTSC and ATSC, along with digital cable channels (with CableCards).

The Series2 DVRs also have USB ports, currently used only to support network (wired Ethernet and WiFi) adapters. [1] The early Series2 units, models starting with 110/130/140, have USB1.1 hardware, while all other systems have USB2.0. There have been four major generations of Series2 units. The TiVo-branded 1xx and 2xx generations were solid grey-black. The main difference was the upgrade from USB1.1 to USB2.0. The 5xx generation was a new design. The chassis is silver with a white oval in the faceplate. The white oval is backlit, leading to these units being called ‘Nightlight’ boxes. The 5xx generation was designed to reduce costs, and unfortunately this also caused a noticeable drop in performance in the system menus as well as a large performance drop in network transfers. The 5xx generation also introduced changes in the boot PROM that make them unhackable without serious soldering. The 6xx generation resembles the previous 5xx model, except that it has a black oval. The 6xx is a new design and the only model available today is the S2DT with dual-tuners and a built-in 10/100baseT Ethernet port as well. The 6xx is the best performing Series2 to date, outperforming even the old leader, the 2xx, and far better than the lowest performing 5xx.

Some TiVo systems are integrated with DirecTV receivers. These “DirecTiVo” recorders record the incoming satellite MPEG-2 digital stream directly to hard disk without conversion. Because of this and the fact that they have two tuners, DirecTiVos are able to record two programs at once. In addition, the lack of digital conversion allows recorded video to be of the same quality as live video. DirecTiVos have no MPEG encoder chip, and can only record DirecTV streams. However, DirecTV has disabled the networking capabilities on their systems, meaning DirecTiVo does not offer such features as multi-room viewing or TiVoToGo. Only the standalone systems can be networked without additional unsupported hacking.

DirecTiVo units (HR10-250) can record HDTV to a 250 GB hard drive, both from the DirecTV stream and over-the-air via a standard UHF- or VHF-capable antenna. They have two virtual tuners (each consisting of a DirecTV tuner paired with an ATSC over-the-air tuner) and, like the original DirecTiVo, can record two programs at once; further, the program guide is integrated between over-the-air and DirecTV so that all programs can be recorded and viewed in the same manner.

In 2005 DirecTV stopped marketing recorders powered by TiVo and focused on its own DVR line developed by its business units. DirecTV continues to support the existing base of DirecTV recorders powered by TiVo.

On July 8, 2006, DirecTV announced an upgrade to version 6.3 on all remaining HR10-250 DirecTiVo receivers, the first major upgrade since this unit was released. This upgrade includes features such as program grouping (folders), a much faster on-screen guide, and new sorting features.

In September 2008, DirecTV and TiVo announced that they have extended their current agreement, which includes the development, marketing and distribution of a new HD DIRECTV DVR featuring the TiVo service, as well as the extension of mutual intellectual property arrangements.

Other than the recently discontinued Hughes Electronics DirectTV DVR with TiVo model HR10-250, the only currently available HDTV capable TiVo units are the Series-3 models, which will record high definition TV. Other TiVo models will only record analog standard definition TV. The Series-3 “TiVo HD, and TiVo HD XL” DVRs are capable of recording HDTV both from antenna (over the air) and cable (unencrypted QAM tuner or encrypted with a Cable Card) in addition to normal standard definition TV from the same sources. Unlike the HR10-250, the new Series-3 units can not record from the DirecTV service (conversely the HR10-250 can not record from digital cable). Other TiVo models may be connected to a high definition TV, but are not capable of recording HDTV signals (although they may be connected to a cable HDTV set-top box and record the down-converted outputs).

In 2008, some cable companies started to roll out Switched Digital Video (SDV) technology, which is currently incompatible with the Series-3 and TiVo HD units. TiVo Inc is working with cable operators on a tuning-adapter with USB connection to the TiVo to enable SDV. As of Fall 2008, some MSOs have started offering these adapters for free to their customers with TiVo DVRs.

Green Screen of Death

The Green Screen error message

The Green Screen of Death (GSoD) is an error message produced by TiVo machines. It is sometimes called the Green Screen of Intensive Care. The message is displayed while the TiVo attempts to repair the data contents of its hard drive. The GSoD is sometimes intentionally invoked as a trouble shooting measure to fix problems that a restart will not.

The Green Screen text reads as follows:

A severe error has occurred.
Please leave the Receiver plugged in and connected
to the phone line for the next three hours while the
Receiver attempts to repair itself.
DO NOT UNPLUG OR RESTART THE RECEIVER.
If, after three hours, the Receiver does not restart
itself, call Customer Care at 1-877-367-8486.

Hacking

Many people and groups have organized to hack the TiVo box, some to improve the service and others to provide service in countries where the TiVo is not currently being sold. TiVo Inc. has generally remained on good terms with these projects, although it has lately tried to clamp down on many of the “back doors” in the software, citing threats to their corporate interests.

Many users have installed additional hard drives or larger hard drives in their TiVo boxes to increase their recording capacity. Others have designed and built Ethernet cards, a web interface (TiVoWeb), and figured out how to extract, insert and transfer video among their TiVo boxes.

TiVo enthusiast groups located in countries where the TiVo is not sold have been able to reverse engineer the television subscription service schedule files needed by the TiVo and the protocol used during the transmission of those files to the TiVo. This allows the TiVo to be supplied with television scheduling data not available by subscription from the U.S.[citation needed] In some countries, these groups operate a simulated TiVo central server to make and distribute the necessary files for programs broadcast within their country. In other countries, each individual TiVo owner operates a simulated server and makes his own files using software that obtains free television scheduling data from the Internet. The ability to supply television scheduling data to the TiVo without paying a subscription fee threatens TiVo Inc.’s subscription-based business model in the U.S., therefore, these groups usually have strict controls over who can access the necessary software or join their group.

Improved encryption found in more recent versions of the TiVo hardware and software has made it more difficult to create the necessary files or to simulate interaction with the TiVo server.

Market share

While its former main competitor in the US, ReplayTV, had adopted a commercial-skip feature, TiVo decided to avoid automatic implementation of that feature, fearing such a move might provoke backlash from the television industry. ReplayTV was sued over this feature,[10] as well as the ability to share shows over the Internet, and these lawsuits contributed to the bankruptcy of SONICblue,[11] their owner at the time. Their new owner, DNNA, dropped both features in the final ReplayTV model, the 5500. However, the automatic commercial-skip feature was simply replaced with Show|Nav, which requires only the push of the arrow buttons to jump between segments. ReplayTV now has a negligible market share, as they no longer manufacture DVR hardware.[citation needed]

Other distributors’ competing DVR sets in the US include Comcast and Verizon, although both distribute third-party hardware with this functionality built-in. Verizon uses boxes fitted for FiOS, allowing high-speed internet access and other features.

As of October 2008, TiVo has 3.46 million subscribers in the US[12][13], down from a peak of 4.36 million in January 2006[13].

Controversies

Privacy concerns

Some users are concerned about TiVo’s ability to collect detailed usage data from units via the telephone line. Like most DVRs, as units are downloading schedule data, they transmit household viewing habits to TiVo Inc. Collected information includes a log of everything watched (time and channel) and remote keypresses such as fast forwarding through or replaying content.[14] Some users were uneasy when TiVo released data on how many users rewatched the exposure of Janet Jackson’s breast during the 2004 Super Bowl.[15] TiVo records usage data for their own research and they also sell it to other corporations such as advertisers.[16] Nielsen and TiVo have also collaborated to track viewing habits.

TiVo states that all usage data is currently aggregated by ZIP code and that they don’t track individual viewing habits. In the United States, users can request that TiVo block the collection of Anonymous Viewing Information and Diagnostic Information from their TiVo DVR by calling 1-877-367-8486.

Automatic software updates

TiVo Inc. has always provided updates of the software that runs TiVo DVRs, usually downloaded along with programming data. These updates have been seen as improvements, offering additional functionality and fixing bugs. Sometimes updates have introduced new bugs or removed features available in the previous versions, which has resulted in criticism from affected TiVo users.

A small percentage of early TiVo units were marketed without being clearly labeled that a subscription was required for full functionality, and some non-subscribing customers were unhappy when they were unable to use new and improved features that subscribers received. It is believed that early dissatisfied, non-subscribing customers received some form of settlement, probably a money-back offer on the hardware, and TiVo now clearly labels its products with a notation that a subscription is required for full functionality. That (and other) TiVo hardware can still be used as a basic digital recorder, recording by date, time, and channel, without a subscription: specifically, any Series1 which shipped with software revision 1.3 or earlier, as well as Toshiba and Pioneer standalone units, which include TiVo Basic. Nearly all Series1 units originally shipped with 1.3 or an earlier release, however, late in the life of the Series1 some units did ship with 2.0 and those units require a subscription. All other standalone TiVo systems require a subscription to function. All DirecTiVo units require an active DirecTV subscription to record new content.

Pop-up advertisements

In March 2005, TiVo began testing “pop-up” advertisements to select beta testers, to explore it as an alternative source of revenue. Many of these “beta testers” were simply subscribers who did not know that TiVo had selected them to test software changes and did not sign up for the beta program [17] The concept is that, as users fast-forward through certain commercials of TiVo advertisers, they will also see a static image ad more suitable and effective than the broken video stream.[18][19]

At its announcement, the concept of extra advertisements drew heavy criticism from TiVo’s lifetime subscribers. Some were upset that they had already paid for a service based upon their previous ad-free experience, while others argued that they had purchased the service for the specific purpose of dodging advertisements.[20]

Early testers complained that the pop-up detector was glitchy, and would sometimes pop up during unrelated commercials, or even during regular TV programming. They also state that the ads are aesthetically unpleasant, and take up a quarter of the screen, obscuring enough of the image to make fast-forward scanning nearly impossible. TiVo says that they are looking into these issues and will fix all of these problems before the advertising functions are rolled out to the public. It is unclear if these advertisements will be rolled out to TiVo enabled boxes with DirecTV and Comcast or just to their own standalone boxes.[19][20]

Content flagging

In September 2005, a TiVo software upgrade added the ability for broadcasters to “flag” programs to be deleted after a certain date. Some customers had recordings deleted, or could not use their flagged recordings (transfer to a computer or burn to DVD), as they could with unflagged material. TiVo has stated this was a bug in the software.[21] In 2004, TiVo entered into an agreement with Macrovision to make TiVo machines copyright-protection flag aware, ostensibly to make it compatible with future pay-per-view and video-on-demand content.

Service contracts

Also in September 2005, TiVo changed their customer agreement, instituting a one-year service contract for all new activations after September 6, 2005. Customers wishing to cancel the service early are subject to an early cancellation fee of up to $200.[22] TiVo has not commented officially on this change, but with their recent drive to attract new customers, as well as subsidizing new hardware through large mail-in rebates, the company could be looking for ways to discourage users from canceling.[23] Customers have also been discouraged by some of TiVo’s Holiday rate increases.[24] Some customer complaints have been made involving TiVo’s unwillingness to lower existing subscibers to advertised monthly rates.

Rebates

TiVo has been a heavy user of mail-in rebates. According to BusinessWeek, the company recognized $5,000,000 in additional revenue when nearly half of the 100,000 new subscribers to the service failed to successfully apply for a $100 rebate, known as the “shoebox effect” (which marketers typically refer to as breakage). While this rate of compliance is fairly typical in the rebate field, the company’s heavy use of the promotional practice caused a large positive impact on its bottom line.[25]

Media industry

One major concern of the media is the fact that advertisements in television programs can be bypassed by using a TiVo DVR. The media industry is highly dependent on sponsorship via advertisements and will lose revenue if viewers adopt TiVo-like systems in large numbers. Knowing this, some countries have taken protectionist measures especially when the media is already struggling due to poor viewing figures. The government of Singapore has banned TiVo, citing the potential adverse impact on the local media industry if TiVo usage were to increase. The government is, however facing difficulty regulating the use of TiVo in Singapore as individuals are bringing in the sets from overseas. TiVo has created a number of ad solutions intended to reach the viewer that fast forwards through ads.

This has not been an issue in Australia where the exclusive rights to TiVo are held by Hybrid Television Services, owned by the Seven Media Group and TVNZ. Seven Media Group is one of Australia’s largest free-to-air broadcasters, and as part of the local market adaptations to TiVo prior to launch, ad-skipping was disabled. Users can still fast forward through ads.

GNU General Public License and “Tivoization”

In 2006, Free Software Foundation (FSF) decided to combat TiVo’s technical system of blocking users from running modified software. This behavior, which FSF dubs “tivoization“, was tackled by creating a new version of the GNU General Public License (GPL v3) prohibiting this activity.[26] The operating system kernel included in the TiVo is distributed under the terms of the GPL, and the FSF’s goal is to ensure that all recipients of software licensed under the new GPL are not restricted by hardware constraints on the modification of distributed software. This new license provision was acknowledged by TiVo in its April 2007 SEC filing: “we may be unable to incorporate future enhancements to the GNU/Linux operating system into our software, which could adversely affect our business“.[27] Regardless, the Linux kernel has not been changed to use GPL v3.

Set-top boxes

A set-top box (STB) or set-top unit (STU) is a device that connects to a television and an external source of signal, turning the signal into content which is then displayed on the television screen.

History

Before the mid-1950s all British television sets tuned only VHF Band I channels. Since all 5 Band I channels were occupied by BBC transmissions, ITV would have to use Band III. This meant all the TV sets in the country would require Band III converters which converted the Band III signal to a Band I signal. By 1955, when the first ITV stations started transmitting, virtually all new British Televisions had 13-channel tuners, quickly making Band III converters obsolete.

Before the All-Channel Receiver Act of 1962 required US television receivers to be able to tune the entire VHF and UHF range (which in North America was NTSC-M channels 2 through 83 on 54 to 890 MHz), a set-top box known as a UHF converter would be installed at the receiver to shift a portion of the UHF-TV spectrum onto low-VHF channels for viewing. As some 1960s-era twelve-channel TV sets remained in use for many years, and Canada and Mexico were slower than the US to require UHF tuners to be factory-installed in new TV’s, a market for these converters continued to exist for much of the 1970s.

Cable television represented a possible alternative to deployment of UHF converters as broadcasts could be frequency-shifted to VHF channels at the cable head-end instead of the final viewing location. Unfortunately, cable brought a new problem; most cable systems could not accommodate the full 54-890 MHz VHF/UHF frequency range and the twelve channels of VHF space were quickly exhausted on most systems. Adding any additional channels therefore needed to be done by inserting the extra signals into cable systems on non-standard frequencies, typically either below VHF channel 7 (midband) or directly above VHF channel 13 (superband).

These frequencies corresponded to non-television services (such as two-way radio) over-the-air and were therefore not on standard TV receivers. Before cable-ready TV sets became common in the late 1980s, a set-top box known as a cable converter box was needed to receive the additional analog cable TV channels and convert them to frequencies that could be seen on a regular TV. These boxes often provided a wired or wireless remote control which could be used to shift one selected channel to a low-VHF frequency (most often channels 3 or 4) for viewing. Block conversion of the entire affected frequency band onto UHF, while less common, was used by some models to provide full VCR compatibility and the ability to drive multiple TV sets, albeit with a somewhat non-standard channel numbering scheme.

Newer television receivers greatly reduced the need for external set-top boxes, although cable converter boxes continue to be used to descramble premium cable channels and to receive digital cable channels, along with using interactive services like video on demand, pay per view, and home shopping through television. Satellite and microwave-based services also require specific external receiver hardware, so the use of set-top boxes of various formats never completely disappeared.

Professional set-top box

Professional set-top boxes are referred to as IRDs or integrated receiver/decoders in the professional broadcast audio/video industry. They are designed for more robust field handling and rack mounting environments, and are also technically superior, IRDs have the distinct feature of outputting uncompressed SDI signals, unlike consumer STBs which don’t mostly because of copyright reasons.

Digital television

An Amstrad DRX500i consumer IRD for Sky Italia

Special digital set-top boxes are available for receiving digital television broadcasts on TV sets that do not have a built in digital tuner. In the case of direct broadcast satellite (mini-dish) systems, providers such as SES Astra, Dish Network, DirecTV, or Astro may use digital set-top boxes.

In the United Kingdom, digital set-top boxes (often referred to as digiboxes, after Sky Digital’s trademark for their unit) are usually for digital terrestrial television through services such as Freeview, a service operated by the Freeview Consortium, or through digital satellite with British Sky Broadcasting and also with digital cable. They are used to access television as well as audio and interactive services through the “Red Button” promoted by broadcasters such as the BBC with BBC Red Button or Sky Digital with Sky Active. Current Freeview set-top boxes and digital televisions are not capable of decoding the protocol DVB-T2 required for terrestrial High-definition in 2009, so viewers may need to purchase a new HD receiver.

In Australia, set-top boxes are the principal means of receiving digital terrestrial broadcasts, as comparably few television sets have in-built digital tuners. The Foxtel set-top boxes (including the Foxtel iQ unit) are also used to receive subscription television from Foxtel. For HDTV receiving, Foxtel is using Beyonwiz-manufactured media centers, which came to market in March 2007.

In the United States, deployment of a very basic coupon-eligible converter box is supported through a $40 federal subsidy to encourage viewers of over-the-air television to adopt ATSC standards before the shutdown of full-power analog broadcasts. (This shutdown, originally planned for February 17, 2009, was re-scheduled for June 12, 2009, due to a concern that an insufficient number of affected viewers would be ready. Also, the transition of over-the-air channels from analog to digital should not be confused with similar digital conversions on cable networks.) These boxes are not readily available in Canada and Mexico, where broadcasters are not yet required to transition to digital television, although ATSC-capable tuners are appearing in some new TVs and television-related products such as computer video capture cards, satellite receivers, and DVD recorders.

Globally, some boxes also have a built-in digital video recorder (or DVR), which often utilizes the electronic programme guide scheduling data and records content to an internal hard drive.

Many TV signal sources

A consumer Palcom DSL-350 satellite-receiver, the IF demodulation tuner is on the bottom left, and a Fujitsu MPEG decoder CPU in the center of the board. Power supply is on the right.

The signal source might be an ethernet cable, a satellite dish, a coaxial cable (see cable television), a telephone line (including DSL connections), Broadband over Power Line, or even an ordinary VHF or UHF antenna. Content, in this context, could mean any or all of video, audio, Internet webpages, interactive games, or other possibilities.

IPTV

In IPTV networks, the set-top box is a small computer providing two-way communications on an IP network and decoding the video streaming media. IP set-top boxes have a built in home network interface which can be Ethernet or one of the existing wire home networking technologies such as HomePNA or the ITU-T G.hn standard, which provides a way to create a high-speed (up to 1 Gigabit/s) Local area network using existing home wiring (power lines, phone lines, and coaxial cables).[1]

In the US and Europe, telephone companies use IPTV (often on ADSL or optical fibre networks) as a means to compete with traditional local cable television monopolies.

In France, Internet providers distribute most of the set top boxes and allow the consumer to have access to IPTV, VoIP, Internet, and media center functionalities.

Ambiguities in the definition

With the advent of flat panel televisions set-top boxes are now deeper in profile than the tops of most modern TV sets. Because of this set-top boxes are often placed beneath televisions and the term set-top box has become something of a misnomer, possibly helping the adoption of the term digibox.

A set-top box does not necessarily contain a tuner of its own. A box connected to a television (or VCR) set’s SCART connector is fed with the baseband television signal from the set’s tuner, and can ask the television to display the returned processed signal instead.

Pace Micro Technology DC757X Set top box

This SCART feature had been used for connection to analogue decoding equipment by Pay TV operators in Europe, and in the past was used for connection to teletext equipment before the decoders became built-in. The outgoing signal could be of the same nature as the incoming signal, or RGB component video, or even an “insert” over the original signal, thanks to the “fast switching” feature of SCART.

In case of analogue pay-TV, this approach avoided the need for a second remote control. The use of digital television signals in more modern pay-TV schemes requires that decoding take place before the digital-to-analogue conversion step, rendering the video outputs of an analogue SCART connector no longer suitable for interconnection to decryption hardware. Standards such as DVB’s Common Interface and ATSC’s CableCARD therefore use a PCMCIA-like card inserted as part of the digital signal path as their alternative to a tuner-equipped set-top box.

The distinction between external tuner or demodulator boxes (traditionally considered to be “set-top boxes”) and storage devices (such as VCR, DVD or disc-based PVR units) is also blurred by the increasing deployment of satellite and cable tuner boxes with hard discs, network or USB interfaces built-in.

Devices with computer terminal-like capabilities, such as the WebTV thin-client, also fall into a grey area.

Software quality

As complexity of the set-top box increases, the software quality practices of the industry become obvious and many systems have bugs.[2] However, users of software-based solutions such as Windows Vista’s Media Center and MythTV have a very flexible list of possible features ranging from basic DVR-like functionality to features such as DVD copying, home automation, and house-wide music/video file playing.

Free your box

Freebox

Freebox V4

The Freebox is an ADSL modem that the French internet service provider named Free provides to its ADSL subscribers.

Its main use is as a high-end wireless modem (802.11g MIMO), but it also allows Free to offer added services using ADSL as support, like HD television (1080p), video recording with timeshifting capabilities, digital radio and free telephony (via one or two RJ11 according to models).

The Freebox is lent to the subscribers, its value being 190 Euros according to the operator. It is delivered with a remote control, a multimedia box equipped with a 80GB hard drive and accessories (cables and filters). According to this article, at the end of first semester 2005, more than 1.1 million subscribers were equipped with the Freebox. According to Company official’s results publication, the 2 million of freebox were reached on September 2006.

V5 generation

Freebox V5

Freebox V5 Multimedia element

Freebox V5 Network element

The Freebox version 5 was released in April 2006 and expanded the possibilities of the modem. It is now divided into two boxes connected together via high-speed Wifi MIMO : the first box provides Internet access, Wifi connection and a phone line; the separated box is a digital video recorder, with advanced TV features like timeshifting, or video on demand.

The multimedia element is able to read HDTV adsl streams and includes a Terrestrial Numerical Television demodulator, can serve as a home A/V broadcasting station, includes a 40Gb hard-drive for recording and time-shifting, and a load of A/V ports.

The Network element is an ethernet Hub and a wifi Hotspot.

The two elements can be linked via ethernet, wifi or High-Speed Networking Over the Mains.

The telephony offer via the Freebox offers various services such as free calls between Freebox and towards the fixed numbers in Metropolitan France and also free over 100 abroad countries (USA, Canada, UK, Spain, China, India, South America etc…).

According to Alexandre Archambault from Free, the Freebox is “nothing other than the return to the fundamentals of the DSL”, whose initial objective was “to connect via a single support several types of terminals, therefore several types of services: telephone (telephony), microcomputer (Internet access), television set (television transmission, video on demand, pay per view…), hi-fi system (radios, etc.)”.

Therefore, it is much more than a simple ADSL modem, which can only make the interface between a computer and the Internet. Free general conditions describe it as “an electronic instrument being used as interface between the data-processing and or audio-visual equipment of the user and the network of Free Telecom”.

Technical features

Freebox V4

The box, designed by Free, uses a 32 bits RC32355 processor and is managed by an operating system using a derivative of the Linux kernel. It has many interfaces:

  • An Ethernet port 10/100 Mbit/s full/half duplex;
  • A USB2 port;
  • An HDMI port;
  • An RJ11 jack for the ADSL connection;
  • An RJ11 jack for phone equipment (two jacks on versions 1 & 2 but only one active);
  • A SCART (Péritel) socket
  • An digital audio output RCA, or optical SPDIF starting from version 3;
  • An extension port of the Serial ATA standard on versions 3 and 4 and Parallel ATA standard on versions 1 and 2;
  • A host USB port on version 4;

Since version 3, the Freebox can be configured to act as a router. The Freebox version 4 appeared mid-2004 and includes a chipset compatible with the ADSL 2+ standard, as well as a USB port, which will allow, in the long term, the addition of functions such as videoconferencing.

The Freebox OS uses BusyBox.

Now with the v3 (and next), it also provides a Videolan client in order to get the movies (in any format read by VLC) stored on the computer and watchable on TV through a playlist selector. This functionality is named Freeplayer.

In the same way, the Freebox (v3 and upper) is able to broadcast TV channels to one or more computer.

Freebox commercials

Set tops explained

Freebox construction video