This option is available for MPEG-1 Layer II only. This applies a technique called intensity coding. The human ear is not as good at
locating higher frequencies as it is lower ones. The use of this mode may introduce more artefacts than stereo.
Stereo [2/0]
This mode treats the incoming audio signal as a left and right channel that the viewer will listen to simultaneously. Practically, these
stereo signals can be uncorrelated where they are coded separately or related where they combined into a sum and difference
channel and each is coded separately.
MPEG-1 Layer II Coding Bit Rates
The following table gives the coding modes and bit rates for MPEG-1 Layer II:
Dolby Digital Encoding
The VCMs support the following coding modes for Dolby Digital encoding:
Mono 1/0 (centre, from left)
Mono1/0 (centre, from right)
Stereo 2/0 (left, right)
The following table gives the coding modes and bit rates for Dolby Digital encoding.
Bit rate
(kbps)
Mono (Left or Right)
Dual Mono
Stereo
Joint Stereo
32
√
X
X
X
48
√
X
X
X
56
√
X
X
X
64
√
√
√
√
80
√
X
X
X
96
√
√
√
√
112
√
√
√
√
128
√
√
√
√
160
√
√
√
√
192
√
√
√
√
224
X
√
√
√
256
X
√
√
√
320
X
√
√
√
384
X
√
√
√
Bit
rate
(kbps)
Single Channel Mono
(1/0)
(Left or Right)
Dual Channel Stereo (2/0)
56
√
X
64
√
X
80
√
X
© Ericsson AB 2011. All rights reserved
© Ericsson AB 2011. All rights reserved
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