L64105 LSI Logic Corporation, L64105 Datasheet - Page 346

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

10.5 Linear PCM Audio Decoder
10.5.1 Packet Header Syntax
Figure 10.4 Linear PCM Packet Syntax
10-14
14 bytes
Header
Pack
Header
9-24 bytes
Linear PCM is a high-fidelity audio coding technique. Unlike MPEG,
Linear PCM is not lossy compressed so that decoders can achieve high-
quality audio reproduction.
As shown in
header, a packet header, a private data section, and audio data. The
parameters inside the private data section include: a substream ID; a
packet length code; and audio frame information such as frame number,
mute, emphasis, first access pointer, number of channels, quantization,
sampling frequency, and dynamic range control value. The packet length,
quantization, sampling frequency, and number of channels are defined in
Table
Audio Decoder Module
Header
Packet
10.3.
Figure
7 bytes
Private
Data
2055 bytes or less
One Audio Pack
10.4, every Linear PCM pack contains a pack
(k bytes
Frame i
left)
Frame i + 1
4 to 2010 bytes
Audio Data
i + n - 1
Frame
Frame
i + n