VS1003 Просмотр технического описания (PDF) - Unspecified

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VS1003

MP3/WMA AUDIO CODEC

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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. WMA

9 Professional and WMA 9 Lossless are not supported. The decoder has passed Microsoft’s

conformance testing program.

WMA 4.0 / 4.1:

Samplerate

Bitrate / kbit/s

/ Hz 5 6 8 10 12 16 20 22 32 40 48 64 80 96 128 160 192

8000 + + +

+

11025

++

16000

++++

22050

++++

32000

++++++

44100

+

++++++

48000

++

WMA 7:

Samplerate

Bitrate / kbit/s

/ Hz 5 6 8 10 12 16 20 22 32 40 48 64 80 96 128 160 192

8000 + + +

+

11025

++

16000

++++

22050

++++

32000

+

+++

44100

+

+++++++

48000

++

WMA 8:

Samplerate

Bitrate / kbit/s

/ Hz 5 6 8 10 12 16 20 22 32 40 48 64 80 96 128 160 192

8000 + + +

+

11025

++

16000

++++

22050

++++

32000

+

+++

44100

+

+++++++

48000

+++

WMA 9:

Samplerate

Bitrate / kbit/s

/ Hz 5 6 8 10 12 16 20 22 32 40 48 64 80 96 128 160 192 256 320

8000 + + +

+

11025

++

16000

++++

22050

++++

32000

+

+++

44100

+

+

+++++ + + + +

48000

+

++ + +

In addition to these expected WMA decoding profiles, all other bitrate and samplerate com-

binations 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: 1.09, 2018-03-16

24

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