Product Details

MP3 Decoder (with Layer 1 & 2 support) is a popular 'lossy' decoder used to greatly reduce audio file sizes, while retaining high levels of audio quality faithful to the original uncompressed version. MP3 decoder (with Layer 1&2 support) supports three layers. MPEG-1/2 audio layer 3(MP3) is one of the most popular in PC and internet applications. MPEG-1/2 audio Layer 2(MP2) is used in TV broadcasting and Video CDs.

In addition to MPEG-1/2, there is a non-standard version widely known as ‘MPEG2.5', which supports additional sampling rates. Refer below for additional information.

Features

  • Transport Stream: Raw MPEG-1/2 audio bit stream
  • Output Status: Frame information such as sample rate, average & maximum bit rates
  • Fast Forward / Rewind: The decoder provides 'hooks' to seek forward or backward to desired position in CBR or VBR streams
  • Extended Test Vector Testing: Compliant with ISO/IEC test vectors and additional test vectors generated using several different encoders
  • Error Codes: Reports up to 5 unique high level error codes. Such as invalid, or non-supported streams
  • Support for Layer 1, Layer 2 and Layer 3
  • Conformance Standard: International Standard ISO/IEC 11172-4 Part 4, 1992, & ISO/IEC 13818-4 Part 4 Compliance Testing 1994
  • Reference Code Revision: ISO/IEC Reference Code 11172-3, MPEG1 MP3, 1993 & ISO/IEC 13818-3, MPEG2 MP3, 1998, Part 3: Audio
  • Framework dependencies: None
  • Release format: Object code module with C interface
  • Input format: Supports bit streams compliant with MPEG1, MPEG2 and (non-official) MPEG2.5, L1/L2/L3. CBR, VBR and (non-official) ABR. Mono, Stereo, Dual Channel and Joint Stereo
  • Output format: Supports up to two channels (Stereo) Interleaved 16-bit PCM (left, right, left, right ...). Only 16-bit PCM output is supported
  • Output buffer samples per block: 1152 samples/channel for MPEG-1; 576 samples/channel for MPEG-2
  • Sample Rate: All sampling frequencies specified by MPEG1 L1/L2/L3 (32, 44.1 and 48kHz); MPEG2 L1/L2/L3 (16kHz, 22.05kHz and 24kHz) and MPEG2.5 L3 (8kHz, 11.025kHz, and 12kHz)
  • Bit Rate: 32-448 kbit/sec for MPEG1 L1, 32-384 kbit/sec for L2 and 32–320kbit/sec for L3. MPEG2 & MPEG2.5, 8 – 160 kbit/s L1/L2/L3
  • Multi-channel: Fully re-entrant and multi-instancing capable
  • Returns ancillary data (Optional)

System Requirements

  • 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.
  • CrossCore Embedded Studio for Analog Devices Processors.

Performance Metrics

MIP Summary:

Code RAM (KiB) Data RAM (KiB) Constant Data Tables (KiB) MIPS
ADSP-BF533 ADSP-BF609 ADSP-BF527
Average Peak Averaged Average Peak Averaged Average Peak Averaged
34.1 28.2 20.8 19.0 20.8 18.7 19.2 18.4 19.0
  • This table highlights example Blackfin processors and expected MIPS performance using optimal memory layout. The BF609 processor includes additional L2 on-chip memory which can help reduce MIPS when fully utilized. Similarly, processors with higher bandwidth external memory interfaces (32-bit versus 16-bit and DDR versus SDRAM) will also help reduce overall MIPS requirements
  • MIPS measured using Microsoft test vectors at a constant bit rate of 128kpbs, 48 kHz sampling rate, optimal memory layout, worst case test vector, running on ADSP-BF533/527/609.
  • BF609 Core Clock = 500 MHz, System Clock = 250 MHz, Dynamic Mem Clock = 250 MHz; BF533 Core Clock = 594 MHz, System Clock = 119 MHz; BF527 Core Clock = 400 MHz, System Clock = 133 MHz.
  • "Data RAM" for one instance, includes Stack, Scratch, Minimum Input and Output Single Buffers.
  • 1 KiB = 1024 Bytes.
  • NOTE: Peak Averaged MIPS is the maximum averaged MIPS over a period of 100ms.

EngineerZone Support Community: Latest Software Modules, Starter Kits and Software Development Kits

Availability and Licensing

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.

沪ICP备09046653号
content here.
content here.

Send Feedback

Close