L64105 LSI Logic Corporation, L64105 Datasheet - Page 157

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

MPEG - mode [1:0]
Audio Decoder Registers
Note:
The mode “stereo” is used if the mode bits specify stereo
or the mode bits specify joint_stereo and the
mode_extension bits are 0b00.
mode_extension Bits
0b00
0b01
0b10
0b11
In Layer III, the mode_extension bits indicate which type
of joint_stereo coding method is used per the following
table. The frequency ranges over which intensity stereo
and ms_stereo are applied are implicit in the algorithm.
mode_extension
Bits
0b00
0b01
0b10
0b11
MPEG mode [1:0] from the bitstream. These bits specify
the mode according to the following table. In Layers I and
II, the joint_stereo mode is intensity stereo. In Layer III,
the joint_stereo mode is intensity stereo and/or
ms_stereo.
Mode Bits
0b00
0b01
0b10
0b11
In all Layer I modes except joint_stereo, the bound
equals 32. In all Layer II modes except joint_stereo, the
bound equals sblimit (subband limit). In joint-stereo
mode, the bound is determined by the mode extension.
Mode
Stereo
Joint_stereo (intensity and/or ms-stereo)
Dual_channel
Single_channel
Intensity
Stereo
Off
On
Off
On
Subbands in Intensity
Stereo
4 to 31, bound = 4
8 to 31, bound = 8
12 to 31, bound = 12
16 to 31, bound = 16
Ms
Stereo
Off
Off
On
On
R [4:3]
4-75