L64105 LSI Logic Corporation, L64105 Datasheet - Page 213

• Manufacturer Part Number: L64105
• Description: Mpeg-2 Audio/video Decoder
• Manufacturer: LSI Logic Corporation

Figure 6.9
63
63
63
System PES Channel Buffer Map for MPEG-1 Streams
The host can subsequently use this value for system synchronization.
The Preparser then moves the packet payload into the Audio ES Channel
Buffer. The Preparser uses the Packet Length field in the packet header
to determine the end of the audio data payload.
If the stream ID is a video stream, the Preparser skips any packet
stuffing bytes and moves the remainder of the packet header into the
System Channel Buffer. INTRn is asserted if not masked and the Video
PES Data Ready Interrupt (Register 2,
then samples the current write pointer for the Video ES Channel Buffer
and stores its value in the System Channel Buffer after the packet
header. The Preparser then moves the packet payload into the Video ES
Channel Buffer. Note that the Preparser must be able to parse the packet
header because there is no header length field.
Figure 6.9
in the System Channel Buffer. The header data is written into the buffer
in 64-bit words (four 16-bit bursts). The 20-bit pointers are aligned to the
MSB and preceded by 44 zero bits to round out the word.
or
or
Preparser
All 0’s
All 0’s
shows the mapping of the header data and payload pointers
System Header Data (24 bytes)
Video PES Header Data
Audio PES Header Data
page
20 19
20 19
4-6) is set. The Preparser
Stuffing Bits
Audio Pointer (20 bits)
Video Pointer (20 bits)
Stuffing Bits
6-17
0
0
0