H.264 HP decoder for C6778 DSP performance

Andrey Lisnevich

Hello,

Can you point me on specifications or describe H.264 HP decoder performance?

For example on single core 1920x1080 H.264 High Profile decoding of single frame takes in average up to 100M cycles (of 1.25 GHz C6678 DSP core). Is it expected result?

Regards,

Andrey Lisnevich

over 12 years ago

0 Hongmei Gou over 12 years ago

TI__Expert 4335 points

Hi Andrey,

H264HP decoder performance can be found from Table 2 of the data sheet @ C66x_h264hpvdec_01_01_01_04_ELF\packages\ti\sdo\codecs\h264hpvdec\Docs\H264_Decoder_C6678_Datasheet.pdf

This table includes the scenarios which are real-time on C6678.

Your number for 1080p30 HP decoding looks as expected. In order to achieve real-time on C6678, 4 cores will be needed to support 1080p30 HP decoding. The current H264HP decoder can run on only 1 core or 2 cores. We are working on an enhanced H264HP decoder which can run on 4 cores also. It is now under development. We will let you know when it is available on Web.

Thanks,

Hongmei

0 Andrey Lisnevich over 12 years ago in reply to Hongmei Gou

Genius 3305 points

Hi Hongmei,

Will enhanced 4 cores decoder be able to decode 1080p50 in real-time?

Regards,

Andrey Lisnevich

0 Hongmei Gou over 12 years ago in reply to Andrey Lisnevich

TI__Expert 4335 points

Hi Andrey,

Can you please confirm if it is 1080p50 or 1080i50? The codec team is collecting cycle numbers. We will let you know when the profiling results with 4 cores are available.

Thanks,

Hongmei

0 Andrey Lisnevich over 12 years ago in reply to Hongmei Gou

Genius 3305 points

Hi Hongmei,

Our stream is 1080i50.

Regards,

Andrey Lisnevich

0 Hongmei Gou over 12 years ago in reply to Andrey Lisnevich

TI__Expert 4335 points

Hi Andrey,

Thanks for the confirmation. According to the profiling results, 4-core H264HP decoder on C6678 can decode 1080i50 in real time (the peak MIPS for your test clip is ~1070 for individual cores).

Thanks,

Hongmei

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H.264 HP decoder for C6778 DSP performance