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MP3 Decoder (with Layer 1 & 2 support)

MP3 Decoder (with Layer 1 & 2 support)

Product
Details
System Requirements
Related Software
Related Hardware
Performance Metrics

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)

Product Downloads

Download the free production version of MP3 Decoder (with Layer 1 & 2 support) (Rel 4.0.0 – ~19 MB)

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.

Related Software

Related Hardware

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.

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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.