Texas Instruments | TMS320C54CST G.726 Algorithm (Rev. A) | User Guides | Texas Instruments TMS320C54CST G.726 Algorithm (Rev. A) User guides

Texas Instruments TMS320C54CST G.726 Algorithm (Rev. A) User guides
 www.spiritDSP.com/CST
SPRS056A – OCTOBER 2001 – REVISED MARCH 2003
D Fully Bit Exact With ITU–T G.726
D Sample-by-Sample or Block-Based Analog
Input
D 16, 24, 32, or 40 Kbps Bit Stream Rate
D A-law, µ-law, and 14-bit Uniform 8-kHz PCM
D
Input/Output
Direct Interface With PCM 8-kHz Sampled
Data. Both Sample-by-Sample and
Block-Based Processing Supported
D Can Process Blocks of Different Lengths
D Very Simple Application Interface
D Compliant With Texas Instruments (TI)
D
eXpressDSP Standard. Code is Reentrant,
Supports Multithreading and Dynamic
Memory Allocation
Can be Easily Ported to any Platform
description
The SPIRIT G.726 conforms to ITU-T G.726 recommendation that specifies speech compression and
decompression at rates of 16, 24, 32, and 40 Kbps based on Adaptive Differential Pulse Code Modulation
(ADPCM). It can be effectively used for speech compression in such applications as speech storing, digital
circuit multiplication and telephony applications.
resource requirements (G.726 and G.711)
MIPS
ALGORITHM
Encoder + Decoder
PEAK / AVERAGE
LINEAR
LAW
µ/A-LAW
10.8 / 10.4
13.3 / 13
PROGRAM MEMORY
(KWORDS)
CONSTANT MEMORY
(KWORDS)
DATA MEMORY
(KWORDS)
2.2
0.5
0.10
availability
The SPIRIT G.726 is available in four forms:
D
D
D
D
eXpressDSP compliant object code for TMS320C54x
Fully functional eXpressDSP evaluation object at extremely low price
Portable C code
Assembly code
The algorithm is supplied with test environment and integration example code.
Detailed product annotation and user guide documents describing testing procedures, interface and integration
of this product, as well as PC-based and DSP-based (TI TMS320VC5406 EVM and TMS320VC5402 DSK)
demos are available for evaluation upon request. To get additional information on CST software, go to
www.spiritdsp.com/CST.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
CST Software Copyright E 2003, SPIRIT Technologies, Inc.
All trademarks are the property of their respective owners.
Copyright  2003, Texas Instruments Incorporated
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