應科院ARM9E
MPEG-4 HE-AAC 音頻解碼器(暫時只提供英文版本) |
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Processor
ARM ARM9E family and above with DSP extensions
Background
MPEG-4 HE-AAC (High Efficiency AAC) is one of the audio
coding tools specified in MPEG ISO/IEC 14496-3, Part3 Audio.
The Spectral Band Replication (SBR) technique is used to
encode the high-band audio spectrum in order to achieve
the same audio quality with almost half the bitrate compared
with MPEG-4 AAC. |
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Decodes
MPEG-4 HE-AAC and AAC-LC bitstreams |
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Supported
sampling frequencies (Hz): 48K, 44.1K, 32K, 16K |
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Provides
mono and stereo decoding |
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| ASTRI
Specific Features |
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Implements
the LP (Low Power) mode for low-complexity requirements
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Allows multiple decoder instances
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Provides
information on bitrate, sampling rate and number of
channels after each successful decoding frame
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Provides
API for streaming application
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Accepts
raw HE-AAC and AAC-LC streams from MPEG-4 audio container
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Memory requirements: 180KByte (Program and Data)
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OS
compatibility: Embedded Linux (Monta Vista, Candenux),
Non-OS, ARM RealV |
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| Performance |
| ASTRI
ARM9E MPEG-4 HE-AAC decoder is optimized on several factors
of the target ARM9E platform: |
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I-Cache
size |
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D-Cache
size |
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SDRAM
speed |
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Availability of TCM |
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| Please
make enquires on the performance for a specific ARM9E platform. |
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