Sampling Rate: The MPEG4 AAC Encoder supports sampling frequency from 8kHz to 96 kHz as specified by the standard.

Bit Rate: The MPEG4 AAC Encoder supports all bit rates specified by the standard.

DESCRIPTION

The Adaptive Digital Technologies MPEG4-AAC (LC/LTP) encoder compresses audio to low bit rates while maintaining near CD quality.

FEATURES

• The given Encoder implements AAC Low complexity (LC) profile of the standard up to 1channels (mono) and 2 channels (stereo).
• The given encoder supports; ADIF (Audio Data Interchange Format), ADTS (Audio Data Transport Stream) and RAW output formats.
• It supports sampling frequency from 8kHz to 96 kHz as specified by the standard.
• It supports all necessary tools and features, so that the given algorithm is standard compliant.
• Compliant with XDAIS specification.
• Rev2/Rev3 specific optimization.

AVAILABILITY

ADT MPEG4 AAC Encoder is available on the TMS320C5000™ DSP Platform

C55x™DSP Generation

SPECIFICATIONS

MIPS (Peak) CPU Resource and Memory Resource Requirements

• C55x

CYCLES INFORMATION –Profiled on TMS320C5510

Configuration	Test File Parameters	MIPS(MAX)	MIPS(AVG)
MPEG4_AAC_5510	64kbps_44.1khz_stereo	71.74	63.13
MPEG4_AAC_5510	64kbps_44.1khz_mono	41.53	31.36

 

MEMORY STATISTICS

All Memory usage is given in units of kilobytes.

Configuration	Program Memery	Constants	Scratch	Instance
MPEG4_AAC_5510	49.27	27.57	6.25	42.88

API FUNCTIONS

AAR_create(…) creates an instance of the encode algorithm and returns a handle to the object

AAR_encode(…) processes the encoder

ALG_delete(…) delete encode algorithm instance