The HDCP repeater bit is a part of the High-bandwidth Digital Content Protection specification and applies to intermediate devices (HDCP Repeaters) between the Source device and the Presentation device. For example, a Blu-ray connected by HDMI to an AV Receiver which in turn connected to a TV using HDMI makes the AV Receiver an HDCP Repeater. The AV Receiver reports to the Transmitter whether it is a Repeater or a Receiver (no downstream devices) using the REPEATER bit.
Following the above example the AV Receiver must report whether it has downstream devices or not using the REPEATER bit. E.g. when the TV is turned on, the AV Receiver should set REPEATER=TRUE, and when TV is turned off it sets REPEATER=FALSE. Since there is no proper way to notify on REPEATER status change, the AV Receiver must reset the connection with the Source. In order to avoid this redundant reset cycles on the connections, which has annoying user-experience, HDCP v1.x allows devices that are potentially Repeater to set the REPEATER all the time, even when no downstream devices are connected (e.g. while the TV is off). In HDCP v2.x that smart has been lost and the Repeater must not keep the REPEATER flag set once it has no downstream devices.
The repeater bit is a part of the HDCPv1 and HDCPv2 specifications, which is available on the digital content protection LLC web site. [1] The specification defines repeater devices:
HDCP Repeater. An HDCP device that can receive and decrypt HDCP content through one or more of its HDCP-protected interface ports, and can also re-encrypt and emit said HDCP content through one or more of its HDCP-protected interface ports, is referred to as an HDCP repeater. An HDCP repeater may also be referred to as either an HDCP receiver or an HDCP transmitter when referring to either the upstream side or the downstream side, respectively.
Some HDCPv1.x devices (usually old) may not agree to work with Repeater that has REPEATER=TRUE but not downstream devices (DEVICE_COUNT=0). Turning off a TV may reset the entire HDMI tree of devices (in some constellations it could be many devices) due to reset of the REPEATER flag.
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High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection developed by Intel Corporation to prevent copying of digital audio and video content as it travels across connections. Types of connections include DisplayPort (DP), Digital Visual Interface (DVI), and High-Definition Multimedia Interface (HDMI), as well as less popular or now deprecated protocols like Gigabit Video Interface (GVIF) and Unified Display Interface (UDI).
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The HD ready is a certification program introduced in 2005 by EICTA, now DIGITALEUROPE. HD ready minimum native resolution is 720 rows in widescreen ratio.
DisplayPort (DP) is a digital display interface developed by a consortium of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA). The interface is primarily used to connect a video source to a display device such as a computer monitor, and it can also carry audio, USB, and other forms of data.
Silicon Image is a provider of semiconductors for the mobile, consumer electronics and personal computers (PCs). It also manufactures wireless and wired connectivity products used for high-definition content. The company’s semiconductor and IP products are deployed by the electronics manufacturers in devices such as smartphones, tablets, digital televisions (DTVs), other consumer electronics, as well as desktop and notebook PCs. Silicon Image, in cooperation with other companies, has driven the creation of some global industry standards such as DVI, HDMI, MHL, and WirelessHD.
The Broadcast Protection Discussion Group (BPDG) is a working group of content providers, television broadcasters, consumer electronics manufacturers, information technology companies, interested individuals and consumer activists. The group was formed specifically for the purpose of evaluating the suitability of the broadcast flag for preventing unauthorized redistribution and to determine whether there was substantial support for the broadcast flag. The group completed its mission with the release of the BPDG Report.
DVB Content Protection & Copy Management often abbreviated to DVB-CPCM or CPCM is a digital rights management standard being developed by the DVB Project. Its main application is interoperable rights management of European digital television, though other countries may also adopt the standard.
The Image Constraint Token (ICT) is a protocol flag that can cause downsampling of high-definition video content on Blu-ray and HD DVD to slightly-better-than-DVD quality video. It is part of the Advanced Access Content System, the Digital Rights Management system used in high-definition optical disc formats.
WirelessHD, also known as UltraGig, is a proprietary standard owned by Silicon Image for wireless transmission of high-definition video content for consumer electronics products. The consortium currently has over 40 adopters; key members behind the specification include Broadcom, Intel, LG, Panasonic, NEC, Samsung, SiBEAM, Sony, Philips and Toshiba. The founders intend the technology to be used for Consumer Electronic devices, PCs, and portable devices.
The Protected Media Path is a set of technologies creating a "Protected Environment," first included in Microsoft's Windows Vista operating system, that is used to enforce digital rights management protections on content. Its subsets are Protected Video Path (PVP) and Protected User Mode Audio (PUMA). Any application that uses Protected Media Path in Windows uses Media Foundation.
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Wireless Home Digital Interface (WHDI) is a consumer electronic specification for a wireless HDTV connectivity throughout the home.
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AV.link, also known under the trade names nexTViewLink, SmartLink, Q-Link, EasyLink, etc., is a protocol to carry control information between audio-visual devices connected via the SCART connector.
