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Compare DM6467T, DM368 and DM8168 video transcoding perfomance

Pavel Sokolov
Prodigy 220 points
Other Parts Discussed in Thread: LINUXDVSDK-DV

Hello.

Our main task is video transcoding and transrating. We need to process as more channels as posssible by one device.

Currently we are using DM8168. It can transcode 16 720x576@25fps or 3 1920x1080@25fps from MPEG2 to H264 High Profile with deinterlacing. So, its about 5 SD channels per one HDVICP.

Main problem is that support for DVRRDK is finished. Also there is no MPEG2 encoder for it and we are looking for the replacement for our task. Actually we are using video h/w acceleration only (not using DSP for audio or other tasks).

We can use put serveral DM368/DM365 or DM6467T to one PCB and merge them via some bus (PCI, USB or other) with our host platform(PC).

So, questions are:

1. How many SD channels can be processed by HDVICP on DM368(1 HDVICP x 432Mhz) comparing to DM8168(3 HDVICP x 432Mhz)? I think it should be 3 times less, about 5 SD channels and about 1 HD channel. Right?

2. Which is the main difference between DM365(270Mhz) and DM368 (432Mhz)? Is it means that DM368 HDVICP about 1.6 times faster than DM365? 

3. How many SD channels can be processed by HDVICP on DM6467T (2 HDVICP x500Mhz) comparing to DM8168? I think it can be calculated as 15/3*2*(500/433) =11channels. Right?

4. Which platform is most stable?

5. linuxdvsdk-dv website page listed only old (2010,2011) SDK. Is there any newer SDK available on request?

6. Codecs on codec page are very old comparing to DM8168. For example H264 decoder on Dm8168 2.0.8.0 but for DM365/368 it is only 1.10.06

7. What about support on  DM365/368 and DM6467T SOCs? Is it active?

8. May be you can recommend other SOC for our task?

Thank you.

  • 0
    TI__Mastermind 35645 points

    Hi,

    Thanks for your post.

    1080i60 MPEG2 Deocde + 1080i60 H264 Encode can be supported on DM6467 1 GHz part and to my knowledge DM6467T MPEG2 decoder is a universal deocder.

    But note that we do not have a 1080i 60 H264 Encoder directly from TI. We have a 1080p30 H264 encoder. I am not sure if any of the 3P had a 1080i60 H264 encoder on DM6467. When I say MPEG2 Deocde + H264 Encode can be supported on 1 GHz part, I am assuming the perfromance of 1080i60 H264 Encoder =~ TI 1080p30 H264 Encoder. If the performance of the H264 encoder varies greatly from the TI 1080p30 encoder, then the analysis has to re-done.

    I can only comment on DM6467T and i do not have idea on the transcoding perfomance for DM368 and DM8168. May be, you could post your queries on DM36x and DM816x community forum which would help you better. For, DM8168 transcoding and deInterlacing performance benchmarks,  you could refer the below e2e post:

    https://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/131855/479345#479345

    Thanks & regards,

    Sivaraj K

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  • 0 in reply to Sivaraj Kuppuraj
    Prodigy 220 points

    Thank you for the answer. Seems that DM6467T is worse than DM8168 for video transcode.

    Our task will be better to run on devices with IVAHD accelerators.