Dolby Digital Compatible Output Encoder for Xtensa HiFi Audio DSPs

Products » Audio DSP » Audio Codecs » Dolby Digital AC-3 Comp Output Encode 5.1

Tensilica’s Dolby Digital Compatible Output Encoder Application Package

Dolby Digital

The Dolby Digital Compatible Output Encoder (DDCO) for the Xtensa HiFi Audio DSPs implements 5.1-channel encoding for the design of consumer devices.

The encoder is a fixed-point implementation written in C and available in object code. Included documentation describes how to incorporate the decoder into a system. Using this package, system developers can integrate an AC-3 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

  • 5.1-channel encoding
  • Supports all standard down-mix modes
  • Supports the full range of bit rates
  • Fully compliant with Dolby Laboratories compliance testing

Specifications - 5.1-Channel encoding - 640 Kbps, 48 KHz


Clock Rate* Code Size (ROM) Table Size (ROM) RAM** I/O Buffer RAM
60 MHz 39 Kbytes 6.8 Kbytes 95 Kbytes 38.5 Kbytes

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

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