AAC DECODER
Advanced Audio Decoder 
C55x
The Adaptive Digital Technologies MPEG4-AAC (LC/LTP) Decoder decodes MPEG4 AAC bit streams. The AAC decoder supports MPEG4 audio decoding for ADIF (audio data interchange format) and ADTS (audio data transport stream) encoded data.
Data sheet - .pdf 
FEATURES
- MPEG4 AAC Low complexity (LC) Object type of the standard for up to 2 channels (stereo).
- MPEG4 AAC Long Term Prediction (LTP) Object type of the standard for up to 2 channels (stereo).
- Supports both ADIF (Audio Data Interchange Format) and ADTS (Audio Data Transport Stream) encoded data.
- Compliant with XDAIS specification.
- Data memory can be allocated at run-time.
AVAILABILITY
ADT MPEG4 AAC Decoder is available on the TMS320C5000™ DSP Platform
C55x™DSP Generation
SPECIFICATIONS
Sampling Rate: The MPEG4 AAC Decoder supports sampling frequencies from 8kHz to 96 kHz as specified
by the standard.
Bit Rate: The MPEG4 AAC Decoder supports all bit rates specified by the standard.
C55X
CYCLES INFORMATION –Profiled on TMS320C5510
Configuration |
Test File Parameters |
MIPS(MAX) |
MIPS(AVG) |
MPEG4_AAC_LC_Low Mem |
64kbps_44.1khz |
9.41 |
8.65 |
MPEG4_AAC_LC_Low MIPS |
64kbps_44.1khz |
7.01 |
6.33 |
MPEG4_AAC_LTP_Low Mem |
64kbps_44.1khz |
9.41 |
8.57 |
MPEG4_AAC_LTP_Low MIPS |
64kbps_44.1khz |
7.02 |
6.22 |
Last update: 10/18/2005
MEMORY STATISTICS
All Memory usage is given in units of kilobytes.
Configuration |
Program Memeory |
Constants | Scratch | Instance |
MPEG4_AAC_LC_Low Mem |
15.27 |
10.22 |
8.00 |
7.48 |
MPEG4_AAC_LC_Low MIPS |
14.61 |
25.42 |
8.00 |
7.48 |
MPEG4_AAC_LTP_Low Mem |
21.46 |
11.35 |
12.00 |
17.48 |
MPEG4_AAC_LTP_Low MIPS |
21.19 |
25.44 |
12.00 |
17.48 |
Last update: 10/18/2005
DECODE_create (…) creates an instance of the DECODE algorithm and returns a handle to the object
DECODE_decode (…) processes the decoder
DECODE_delete (…) deletes the instance of the dynamically created object referenced to by the handle
