taz291819 wrote: You said it yourself, both HDMI 1.3 and HDMI 1.4 are both limited to 340Mhz. If HDMI 1.3 doesn't have the bandwidth, how can HDMI 1.4 have the bandwidth?
Does it have the bandwidth? 8) The fact that HDMI 1.4 requires CEA-861-E and the latter defines 1920x1080 120 Hz mode does not mean that HDMI devices can support this mode - every mode is optional, even the "standard" ones, and besides that single 120 Hz mode, there are probably enough other important revisions in the document to warrant its use.
If the Quantim Data 881/882 example was not enough, here is the latest TDMS transmitter chip from Silicon Image that supports HDMI 1.4 3D formats,
http://www.siliconimage.com/products/pr ... px?pid=153" onclick="window.open(this.href);return false; I don't see any support for 720p120, CEA-861-E and 1080p120 in the specs.
Another 1.3a compliant device
http://www.nxp.com/documents/data_sheet/TDA19978A.pdf" onclick="window.open(this.href);return false; that only supports 235 MHz clock, enough for 36-bit 1080p60.
1080p60 (24-bit) uses ~3.56Gbps x 2 is 7.12Gbps for Full 1080p 3D
You can not multiply it this way, because guard intervals are defined in seconds and so total pixel resolution will more than just 2 times higher. Please check
http://vesa.org/Standards/free.htm" onclick="window.open(this.href);return false; for XLS spreadsheets which can be used to calculate the timings by GTF, CVT and CVR (reduced blanking) formulas, which should give you the idea.
Considering that standard CEA-861 60 Hz mode 16 has a total of 2200 x 1125 pixels (something in between CVT-standard 2576 x 1120 and CVR 2080 x 1111 pixels), 1080p120 could in fact fit into 8 Gbit/s. Unfortunately, I can't find the timings online because the license terms for CEA-861-E disallow anyone to publish the text of the standard, and EDID tools for getting the Detailed Timings Data block would be useless because there is no 1080p display capable of taking 120 Hz input.
don't quite understand why vertical blanking is necessary with Blu-Ray
It has nothing to do with the image source, be it Blu-ray or video game, blank lines are generated by the transmitter logic. NTSC/PAL, CEA/EBU/SMPTE (TV, DTV and HDTV), VESA (computer display), military and medical video modes have always been defined with blanking for the last 55 years. What would be a good reason for dropping it and making all current displays go straight to the trash can, except for a minor bandwidth gain?
The practical pplication is tranmitting audio data in blanking intervals of HDMI Data Island periods.
BTW pixel clocks for most common 50 and 59.94/60 Hz DTV/HDTV modes were artificially made equal by adding more blanks to the 50 Hz signal. I can't understand wWhat's up with that requirement.