In other words TMDS is still used to transmit the data and it's still an interleave scheme and audio is still dependent on video. What the various revisions have not done is change the way it works.

The changes have been facilitated by the introduction of new hardware, transmitter/receivers, that are always backwards comparable per the HDMI licencing standard. What the various HDMI revisions have done is bring more bandwidth, faster transmission rates, and more features. With regards to audio specifications, v2.0 increases the maximum audio channels supported from 8 to 32 and it will now support up to 4 audio streams. Color space support has been increased with various revisions. Color format support has remained consistent until v2.0 where YCBCR 4:2:0 is now supported. TMDS clock rates have increase three times as well from 165 MHz, 340 MHz, and 600 MHz. HDMI revisions from v1.0 to v2.0 have yielded three increases in transmission bandwidth from 4.95 Gbit/s, 10.2 Gbit/s, 18.0 Gbit/s, and three maximum data rates, 3.96 Gbit/s, 8.16 Gbit/s, and 14.4 Gbit/s. HDMI is based on DVI and TMDS technology. I would submit it has every thing to do with it. Same source transmitter, same data stream, two different HDMI cables, and three different versions of HDMI sharing HDCP continuity.Ĭlick to expand.You seem to be shifting the discussion or perhaps backpeddling. The small display with HDMI v1.0/DVI does not recognize the flag from the Oppo BDP-103 HDMI v1.4 transmitter to blank the video. That can only be because they are both receiving the same data. Yet, both displays are showing the same video display. This would be the setting for audio only from the Oppo number 2 HDMI output. If you note the screens, you will see that the Duel HDMI Output - Split audio/video is selected. The Number 2 BDP-103 HDMI output was/is for the benefit of audio only. The small screen display is HDMI v1.0/DVI complient and it is being fed the number 2 HDMI output from the Oppo BDP-103. The HDMI output of the Pioneer AVR is input to a Pioneer plasma with HDMI v1.3. The number 1 HDMI output from the BDP-103 is input to a Pioneer AVR that is HDMI v1.3 complient. This is the output display from an Oppo BDP-103, it has duel HDMI outputs, v1.4, and both are being used. That holds true whether you believe the video is there or not or a black screen or a static image.ĮDIT: Here's an example, please refer to the attached photo. My actual point, for clarification, is that there is no inherent benefit or improvement in terms of audio quality in using two HDMI cables because of the way the data is transmitted TMDS.

The 'black screen' is a data flag set for that output leg from the same transmitter. The advantage of having two HDMI outouts is in sending the signal to a separate video processor/display or mismatched HDMI/HDCP implementations like having an AVR that supports version 1.4 and a display that supports version 2.0.Ĭlick to expand.And I maintain that the video is there. The deception is believing that you're separating audio and video by using two cables. While this is not necessarily a lie as you're kind of splitting or separating the the same signal to two different devices, it's really no different than sending a single HDMI cable to an AVR/prepro where the HDMI signal is passed through to the display device. Some manufacturers have positioned product with two outputs as 'splitting' audio/video. If the video display does not have some kind of audio section, the audio information is at a dead end but still present on the HDMI cable. So, if you have a bluray with two outputs, the output going to your AVR/prepro still has the video information/signal but the AVR/prepro not being a video display per se does not display it. TDMS does not really allow you to separate audio from video. HDMI by design has a single source (transmitter) and a single sink (receiver). An analogy would be an AC duplex receptacle where you can plug two lamps or other AC devices into the outlet and they receive the same electricity. For example, a bluray player with two HDMI outputs simply has two identical outputs coming from the same transmitter. HDMI uses transition-minimized differential signaling (TMDS) on HDMI which interleaves video, audio and auxiliary data using three different packet types and a clock channel. In other words, you do not or cannot separate them. Click to expand.You can use two different HDMI cables from a single source, but the same audio and video signals will be present on both cables.

Hdmi split audio and video