<P> HDMI 1.2 was released on August 8, 2005 and added the option of One Bit Audio, used on Super Audio CDs, at up to 8 channels . To make HDMI more suitable for use on PC devices, version 1.2 also removed the requirement that only explicitly supported formats be used . It added the ability for manufacturers to create vendor - specific formats, allowing any arbitrary resolution and refresh rate rather than being limited to a pre-defined list of supported formats . In addition, it added explicit support for several new formats including 720p at 100 and 120 Hz and relaxed the pixel format support requirements so that sources with only native RGB output (PC sources) would not be required to support YC C output . </P> <P> HDMI 1.2 a was released on December 14, 2005 and fully specifies Consumer Electronic Control (CEC) features, command sets and CEC compliance tests . </P> <P> HDMI 1.3 was released on June 22, 2006 and increased the maximum TMDS clock to 340 MHz (10.2 Gbit / s). Like previous versions, it uses 8b / 10b encoding, giving it a maximum video bandwidth of 8.16 Gbit / s (1920 × 1080 at 120 Hz or 2560 × 1440 at 60 Hz). It added support for 10 bpc, 12 bpc, and 16 bpc color depth (30, 36, and 48 bit / px), called deep color . It also added support for the xvYCC color space, in addition to the Rec. 601 and Rec. 709 color spaces supported by previous versions, and added the ability to carry metadata defining color gamut boundaries . It also optionally allows output of Dolby TrueHD and DTS - HD Master Audio streams for external decoding by AV receivers . It incorporates automatic audio syncing (audio video sync) capability . It defined cable Categories 1 and 2, with Category 1 cable being tested up to 74.25 MHz and Category 2 being tested up to 340 MHz . It also added the new type C Mini connector for portable devices . </P> <P> HDMI 1.3 a was released on November 10, 2006 and had Cable and Sink modifications for type C, source termination recommendations, and removed undershoot and maximum rise / fall time limits . It also changed CEC capacitance limits, and CEC commands for timer control were brought back in an altered form, with audio control commands added . It also added the optional ability to stream SACD in its bitstream DST format rather than uncompressed raw DSD . </P>

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