Microchip Technology Inc

MP3 Decoder Library for PIC32MX


 MP3 Decoder Library for PIC32MX, MLA based

MP3 is a compression format for storing digital audio data. It is an audio codec that has the capability to compress the original audio source with minor loss in sound quality. The higher the compression ratio, the lower the quality. Therefore, there is a balancing act between file size and audio quality. With the right combination, MP3 encoded data can provide very high quality audio.

One of the advantages of MP3 audio is that it can be separated into segments. Each segment is independent and may be decoded or played. This feature makes it a very attractive scheme for streaming audio.

The Microchip compact MP3 decoder features:

•Implements MPEG-1, Audio Layer III decoder (ISO/IEC 11172-3)

•Simple user interface – initialize decoder and pass MP3 data

•Optimized C callable APIs

•Assembly optimized implementation for overall performance

Supported sample rates:

32 KHz, 44.1 KHz, 48 KHz

Supported bit rates (kbps)

32, 40, 48, 56, 64, 80, 96, 112, 128, 160,192,224,256, 320 and Variable Bit Rate.

Microchip offers MP3 Decoder library both in non-modifiable binary code and source code formats that enables usage on high performance PIC32MX devices.

PIC32MX Compact MP3 Decode Library (Non-modifiable Binary Code)

Microchips compact MP3 algorithm designed to fit in small memory footprint PIC32MX Microcontrollers. This code requires only 28MIPS of performance (CD Quality audio), 42KB Flash and 11KB RAM memory for operation on the PIC32MX. This part number is for Non-modifiable binary code. Source code is also available on Microchip Direct. Requires patent-only licensing through technicolor.

PIC32MX Compact MP3 Decode Library (Source Code)

Microchips compact MP3 algorithm designed to fit in small memory footprint PIC32MX Microcontrollers. This code requires only 28MIPS of performance (CD Quality audio), 42KB Flash and 11KB RAM memory for operation on the PIC32MX. This part number is for modifiable source code. A binary-only version of this code is also available on Microchip Direct. Requires patent-only licensing through Technicolor.

For more details on the MP3 decoder, please see the user’s guide below.

2 Demonstration vehicles are available in HEX format for use with the PIC32 Bluetooth Starter Kit, and the PIC32 Bluetooth Audio Developers Kit. Please note that these are not compatible with one another. The demo provides MP3 playback from a USB memory stick.

MP3 Decoder Library for PIC32 is also available in MPLAB Harmony. Click Here for details.

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