TMS320AV7110 datasheet(24/131 Pages) TI

номер детали	TMS320AV7110

подробное описание детали	Integrated Digital Set-top Box Decoder Functional Specification

PDF	131 Pages

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производитель	TI [Texas Instruments]

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DSP

TMS320AV7110

Revision 3.1

10/08/99 22:18

Page 24

5.6 Transfer of Video/Audio Data from the High Speed Data Interface

(HSDI) to SDRAM

With APIs, it is possible to use the general purpose DMA (GPDMA) on the 'AV7110 to feed

audio/video data from the HSDI to the audio/video circular buffers in the SDRAM. Although it is not

recommended, it is possible to do this from the application software as well. Given restricted traffic

through the Transport Packet Parser (TPP, see Section 6.1), it is possible to transfer low-frequency

Elementary Stream Video Data using the appropriate API. Likewise, similar Audio PES or Elementary

Stream data can be transferred. No PTS processing can be done in this mode. Also, the application

software manages data types coming into the HSDI. Management of the audio and video circular

buffers will however be handled automatically by the TC hardware in this case.

When there is other TPP Audio/Video data traffic, the transfer mechanism is handled differently. When

audio or video is played from the HSDI, the same type of data cannot be demultiplexed from the

incoming DVB stream via the TPP hardware. The ARM sets up a transfer for the data from the HSDI

via an API called from the application software.

TMS320AV7110 датащи(PDF) 24 Page - Texas Instruments