WMA Decoder C55x - C54x

The Adaptive Digital Technologies WMA Decoder .pdf is Class 4 implementation of WMA decoder, fully support all versions of WMA namely V2, V7, V8, V9, V9beta, V9NC and VBR(Variable Bit Rate) . The WMA decoder converts audio data in compressed format to uncompressed format(16bit raw PCM). It supports sampling frequencies from 8 kHz to 48 kHz and all bit-rates specified by the standard.

FEATURES

Supports DRM (Digital Right Management).
Supports 2 channels in stereo mode (stereo/mono).
Support 8-48 kHz output sampling rates and 5-384 kbps input bit rate
Bit-Compliant as per the Microsoft test acceptance criterion.
Compliant with XDAIS specification.

AVAILABILITY

ADT MP3 Decoder is available on the TMS320C5000™ DSP Platform

C55x™ and C54x DSP Generation

SPECIFICATIONS

Sampling Rate: The WMA Decoder supports sampling frequency from 8kHz to 48 kHz as specified

by the standard.

Bit Rate: The WMA Decoder supports all bit rates as specified by the standard.

C55X

CYCLES INFORMATION –Profiled on TMS320C5510
Measured with number of frames = 500, all internal memory.

Configuration	Test File Parameters	MIPS(MAX)	MIPS(AVG)
WMA decoder (non-DRM)	48kHz – 320 kbps	55.13	30.14
WMA decoder (non-DRM)	48kHz – 192 kbps	34.72	23.66
WMA decoder (with DRM)	48kHz – 320 kbps	47.92	28.50

Last update: 05/31/2006

MEMORY STATISTICS
All Memory usage of WMA C55X is given in units of kilobytes. (1 kilo byte = 1024 bytes)

Configuration	Program Memory	Constants	Scratch	Instance
WMA decoder (non-DRM)	28.03	33.78	8.7	26.72
WMA decoder (with DRM)	51.31	38.05	8.7	29.74

Last update: 05/31/2006

C54x

CYCLES INFORMATION –Profiled on TMS320C5510

Configuration	Test File Parameters	MIPS(MAX)	MIPS(AVG)
WMA decoder (non-DRM)	48kHz – 320 kbps	78.1	40.0
WMA decoder (non-DRM)	48kHz – 192 kbps	69.5	35.7
WMA decoder (with DRM)	48kHz – 320 kbps	100.4	91.9

Last update: 05/31/2006

MEMORY STATISTICS
All Memory usage of WMA C54X is given in units of kilo words (1 kilo word = 1024 words).

Configuration	Program Memeory	Constants	External	Scratch	Instance
WMA decoder (non-DRM)	15	8.1	7.3	4	20
WMA decoder (with DRM)	30	10.2	7.3	4	22

Last update: 05/31/2006

DECODE_create(…) creates an instance of the DECODE algorithm and returns a handle to the object.

DECODE_decode(…) processes the calls to the decoder.

DECODE_delete(…) deletes the instance of the dynamically created object referenced to by the handle