TI DSPS 3rd Party Listings: Vocoder Algorithms: G.729 CS-ACELP Voice Coder

Digital Signal Processing Solutions Tools: Vocoder Algorithms

Product Name:	G.729 CS-ACELP Voice Coder
Company Name:	RadiSys Corp., DSP Division
Features & Benefits:	10 channels per DSP Multi-thread multi-tasking supported Compatible to TASK-6000 development framework
TMS320 Devices Supported:	C6x
Data Rate (kbps):	8
Program Memory (k word):	11
Data Memory (k word):	0.8
Processor Loading (MIPS):	15
Target Platform:	SPIRIT-6000 (TMS320C6201)
Hardware Requirements:	Best demonstrated over SPIRIT-6000 cPCI board with E1/T1 interface and EVM.
Technical Support/Training Available:	YES
Overview:	The CS-ACELP (Conjugate-Structure Algebraic Code Excited Linear Prediction) is a bit-exact implementation of ITU G.729 for the TMS320C6x. G.729 is an international standard for encoding 8 kHz sampled speech signals for transmission over 8kbps channels. G.729 encodes 80 sample frames (10 ms) of 16-bit linear PCM data into ten 8-bit code words. G.729 provides near toll quality performance under clean channel conditions. RadiSys' G.729 coder operates on 10 ms frames with 5 ms of lookahead, allowing low transmission delays. The coder offers good speech quality in network impairments such as frame loss and bit errors, and is suitable for applications such as voice over frame relay, teleconferencing or visual telephony, wireless telephony, and voice logging. Additional bandwidth savings are possible via voice activity detection (G.729 Annex B).
Ideal Performance:
Algorithm Verification:	Full ITU test vectors compatibility. Listening, continuous and DTMF tone passing tests on SPIRIT-6000
Availability:	Q3 1997
Operating System Used:	TASK-6000 Framework. Ports to any other operating system.
Tools Supported By:
Company Information:	RadiSys Corp., DSP Division 2 Wells Avenue Newton MA 02159-3208 USA Tel: 800 628 6502 Fax: 616 235 2531 e-mail: info@radisys.com www: http://www.radisys.com
	RadiSys designs and manufactures a wide range of standard and custom embedded and stand-alone products, including TI DSP-based data and signal processing solutions.