MPEG-4 aacPlus v1 Encoder for Xtensa HiFi Audio DSPs

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The MPEG-4 aacPlusTM v1 Encoder package for the Xtensa HiFi Audio DSPsimplements 24-bit MPEG-4 aacPlus v1 encoding compliant with ISO/IEC 14496-3, supporting AAC and SBR (Spectral Band Replication) in mono and stereo configurations. The encoder is a fixed-point implementation written in C and available in either object or source code. Included documentation describes how to incorporate the decoder into a system. Using this package, system developers can integrate a MPEG-4 aacPlus encoder into an SOC without the need for additional optimizations or software development. The same Xtensa HiFi Audio DSPs are used for other Tensilica audio codecs, enabling the development of highly optimized multi-standard audio SOC designs.

Feature Summary

  • Support for Spectral Band Replication (SBR)
  • Compliant with ISO/IEC 14496-3 and the 3GPP specifications for Enhanced aacPlus

Specifications


Encoder
Clock Rate*
Code Size (ROM)
Table Size (ROM)
RAM**
I/O Buffer RAM
64 Kbps, 48 KHz 51 MHz 123 Kbytes 41 Kbytes 100 Kbytes 9.5 Kbytes
128 Kbps, 48 KHz 53 MHz 123 Kbytes 41 Kbytes 100 Kbytes 9.5 Kbytes


* Average MHz required for single-cycle memory.
** RAM includes persistent, stack and scratch.

aacPlus and SBR are trademarks of Coding Technologies and Coding Technologies reserves all rights to these names.

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