Specialists in Speech and Audio Software Development

Material Copyright © 2023 ESPICO Ltd

MPEG1 Layer III Audio Encoder

ISO/IEC 11172-3 (MPEG 1) defines methods for compression/decompression of up to two channels of audio data sampled at 32, 44.1, 48 kHz at bit-rates from 32 to 384 kbit/s.

Three related methods are described referred to as Layer I, II and III. Layer III offers the highest compression for a given audio fidelity but requires the highest complexity.

ESPICO’s highly optimised implementations have low memory and MHz requirements. Contact ESPICO for specific resource requirements.

Features

• Encodes MPEG1 (ISO/IEC 11172-3) audio bitstreams
• Bitstreams are compliant with ISO/IEC 11172-4:1995(E) conformance standard
• CBR, VBR and free format support
• Compile time customization options for reduced memory footprint:

 - Layer II Enable/Disable

 - Layer III Enable/Disable

Availability

ESPICO’s optimised solution can be ported to any platform. Platforms supported include:

• ZSP Cores including ZSP400, ZSP500, ZSP800 families
• ARM including Cortex and NeonTM
• MIPS32 74KTM
• Ceva DSP Cores

Applications

• Set-top boxes
• In-car audio
• Mobile phones
• Digital radio