DM365 H264 decoder error concealment

jan vazen

Hello,

I am using dm365_h264dec_02_00_00_13 to decode H264 stream encoded by the same platform, in closed loop mode.

The problem I am having is with the error concealment:

For example if one frame is encoded into 5 slices, it takes about 5ms to decode. Here is a table of how much time it takes to decode one frame in relation to missing slices:

Slices missing (out of 5): | time to decode

0 | 5ms

1 | 10ms

2 | 13ms

3 | 15ms

4 | 19ms

This is absolutely unacceptable behavior. Is there any way to turn off the error concealment? The problem is that this makes decoding impossible to do in real time. Workaround currently is to not decode frames that contain missing slices.

over 13 years ago

0 Veeranna Hanchinal over 13 years ago

TI__Expert 8465 points

Hi Jan,

DM36x error concealment not fully optimized one, And in the current version we don't have any option to turn it off.

Which decoder mode you are using? If you are using closed_loop mode there is way, you need to move next version 02.00.00.14 from local TI contact. And this version has speed performance degradation for closed_loop(universal mode).

Thanks,

Veeranna

0 jan vazen over 13 years ago in reply to Veeranna Hanchinal

Prodigy 160 points

I meant to say closed loop, not loop back mode. So yes, I am using it in the closed loop mode. Is there any NDA involved for getting the latest version?

0 Veeranna Hanchinal over 13 years ago in reply to jan vazen

TI__Expert 8465 points

No NDA required, as it has flaws(specifically in universal mode) we didn't uploaded external web. One more point I remembered If you turn off concealment, you will see some pixel lines visual corruption around missing slices(I mean even in good slices), During display you need to find some workaround to avoid it.

0 jan vazen over 13 years ago in reply to Veeranna Hanchinal

Prodigy 160 points

OK, thank you, that sounds reasonable.

Who exactly do I contact to get a copy of it?

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DM365 H264 decoder error concealment