概述

优势和特点

  • 传输流: 外部解析ADTS、ADIF和MP4文件格式。 解析器由ADI公司提供。
  • 输出状态: 采样速率、输出通道数等
  • 快进/快退: 提供重新同步功能,允许用户从任意接入点继续回放。
  • 扩展测试矢量测试: 兼容ISO/IEC测试矢量和异常内容的额外测试矢量。
  • 误差代码: 报告最多9种唯一误差代码,如输入缓冲器下溢和不支持的数据流。
  • Software Quality Standard: A report on the level of MISRA-C compliance for this module is available upon request.
  • Target Processor: Code compatible across the SHARC ADSP-213xx and ADSP-214xx processors
  • Conformance Standard: ISO/IEC 14496-3 (MPEG-4) AAC Profile at Level 5
  • Reference Code Revision: ISO/IEC 14496-5:2001, March 2006
  • Framework dependencies: None
  • Release format: Object code module with C source wrapper
  • Input format: Supports streams with MPEG-2 AAC-LC profile (ISO/IEC 13818-7) and MPEG-4 AAC-LC audio object (ISO/IEC 14496-3: 2005)
  • Bit Rate: All bit rates specified by standard
  • Output format: Supports up to 6 channels of 32-bit floating point (IEEE-754) PCM (normalized to within the range of -1.0 and +1.0), with configurable output buffer location (separate non-interleaved channel buffers)
  • Sample Rate: All sample frequencies (up to 96 kHz) specified by the standard ISO/IEC 14496-3
  • Multi-threading: Fully re-entrant and multi-instancing capable


产品详情

This library for the SHARC processor is an implementation of the MPEG-4 AAC-LC (Low Complexity Advanced Audio Coding) decoder, which is conformant to the standard defined by ISO/IEC in MPEG-4 Audio. This version will support multi-channel audio (up to 6 output channels).

许可

Each module supports the Analog Devices, Inc. (ADI) Blackfin or SHARC Processor family and is a licensed product that is available in object code format. Recipients must sign or accept a license agreement with ADI prior to being shipped or downloading the modules identified in the license agreement.

性能指标

MIPS summary:

SHARC Processor  Code memory (KiB)  Data RAM (KiB)  Constant Data Tables (KiB)   MIPS
 Average
Peak 
 ADSP-21364
 62.1
 87.9
 30.5
 22.0
 24.4
 ADSP-21469 / 21479 / 21489
 45.3
 87.9
 30.5
 22.0
 24.4

  • MIPS measured using a 5.1 vector (SCE+2*CPE+LFE+CCE(D)) with bit rate 373kpbs, Fs=48 kHz, internal memory code and data layout, on a SHARC ADSP-214xx processor.
  • "Data RAM" for one instance, includes Stack, Scratch, Instance/State, Minimum Input and Output Single Buffers.
  • Input buffer size is 4.5KiB and output buffer size is 24KiB for decoding 6 audio channels.
  • Reduced code size for ADSP-21469 is due to the short-word instruction mode available for this processor family.

系统要求

  • Windows XP Professional SP3 (32-bit only).
  • Windows Vista Business/Enterprise/Ultimate SP2 (32-bit only). It is recommended to install the software in a non-UAC-protected location.
  • Windows 7 Professional/Enterprise/Ultimate (32 and 64-bit). It is recommended to install the software in a non-UAC-protected location.
  • Minimum of 2 GHz single core processor, 3.3 GHz dual core is recommended.
  • Minimum of 1 GB memory (RAM), 4 GB is recommended.
  • Minimum of 2 GB hard disk (HDD) space is required.

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