參數(shù)資料
型號: VS1003
廠商: Electronic Theatre Controls, Inc.
元件分類: Codec
英文描述: MP3 / WMA AUDIO CODEC
中文描述: MP3播放/ WMA音頻編解碼器
文件頁數(shù): 24/57頁
文件大小: 456K
代理商: VS1003
VLSI
Solution
y
VS1003 PRELIMINARY
VS1003
8. FUNCTIONAL DESCRIPTION
8.2.2
Supported WMA Formats
Windows Media Audio codec versions 2, 7, 8, and 9 are supported. All WMA profiles (L1, L2, and L3)
are supported. Previously streams were separated into Classes 1, 2a, 2b, and 3. The decoder has passed
Microsoft’s conformance testing program.
WMA 4.0 / 4.1:
Samplerate
/ Hz
8000
11025
16000
22050
32000
44100
48000
Bitrate / kbit/s
22
32
5
+
6
+
8
+
+
10
12
+
16
20
40
48
64
80
96
128
160
192
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
WMA 7:
Samplerate
Bitrate / kbit/s
22
32
/ Hz
8000
11025
16000
22050
32000
44100
48000
5
+
6
+
8
+
+
10
12
+
16
20
40
48
64
80
96
128
160
192
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
WMA 8:
Samplerate
Bitrate / kbit/s
22
32
/ Hz
8000
11025
16000
22050
32000
44100
48000
5
+
6
+
8
+
+
10
12
+
16
20
40
48
64
80
96
128
160
192
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
WMA 9:
Samplerate
Bitrate / kbit/s
32
40
/ Hz
8000
11025
16000
22050
32000
44100
48000
5
+
6
+
8
+
+
10
12
+
16
20
22
48
64
80
96
128
160
192
256
320
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
In addition to these expected WMA decoding profiles, all other bitrate and samplerate combinations are
supported, including variable bitrate WMA streams. Note that WMA does not consume the bitstream as
evenly as MP3, so you need a higher peak transfer capability for clean playback at the same bitrate.
Version 0.92,
2005-06-07
24
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