Products
GSM-HR Speech Codec
Product Briefs
HiFi 2 & HiFi EP Audio DSP Product Brief
White Papers
Everything You Wanted to Know About Blu-ray Audio, but were afraid to hear
Put Low-Power, Low-Overhead, High-Fidelity Digital Sound in Your Next ASIC or SOC
A Designer's Guide to HD Video Pre- and Post-Processing
How to Add Low-Power, Multi-Codec Digital Video and Audio to Your Next ASIC or SOC Design
Presentations
2011 Linley Tech Moble Conference Presentation
Customer Success
Tensilica’s GSM-HR Speech Codec Application Package
GSM Half Rate (HR) is used for coding of speech at 5.6 Kbps for GSM. It implements the speech codec standard specified in 3GPP TS 46.002 V9.0.0 (2009-12) and its related documents. The codec is a fixed-point implementation written entirely 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 GSM-EFR codec into an SOC without the need for additional optimizations or software development. The same Xtensa HiFi Audio DSPs are used for other Tensilica audio and voice codecs, enabling the development of highly optimized multi-standard audio and voice SOC designs.
Feature Summary
- GSM-HR decoding and encoding
- Fully compliant with 3GPP specifications
Specifications - 5.6 Kbps
| Clock Rate* | Code Size | Table Size (ROM) | Total RAM** | |
| Encoder | 11.9 MHz (DTX on) |
58 Kbytes |
15.7 Kbytes |
7.5 |
| Decoder | 1.8 MHz | 2.8 |
* Average MHz required for single-cycle memory.
** Total RAM includes persisitent, stack and scratch.
