Product category:
Embedded Software and Operating Systems
News Release from: Kane Computing | Subject: Sparse line echo cancelling solution
Edited by the Electronicstalk Editorial
Team on 12 May 2003
Cost-effective line echo cancellation
New from Kane Computing is the original version of the ITU G.168 compliant Sparse line echo cancelling solution from Spirit.
New from Kane Computing is the original version of the ITU G.168 compliant Sparse line echo cancelling solution from Spirit To be used mainly with T1/E1 lines, the Sparse line echo cancelling solution is a 30-channel version of Spirit's G.168-2000 MIPS economy echo canceller implemented on a single TMS320VC5510 DSP, making it extremely cost effective in comparison with existing hardware solutions
This article was originally published on Electronicstalk on 10 Apr 2002 at 8.00am (UK)
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One of the distinguishing features of the Sparse line echo cancelling solution is that it runs as a full TAP LEC solution with short tail lengths, while operating as a Sparse solution with long tail lengths.
MIPS can be traded for tail length for each channel separately.
The solution is well suited for gateways and central office equipment that supports advanced echo suppression functionality.
The software is eXpress DSP compliant and has low MIPS and memory requirements.
The functions are C-callable with user configurable parameters.
Other features include; multiple channel operation, a maximum compensated echo path of 128ms, nonlinear processor, comfort noise generator, automatic tail search, fast convergence, no divergence due to double-talk, tone disabler disables echo canceller during voice-band modem connections, convergence monitor and excellent voice quality.
The Sparse line echo cancelling solution consumes 5.6MIPS, 2.6Kword of program memory, and 2.4Kword of data memory per channel, and functions mainly on 64 and 128ms echo tail.
With short tail length (16 to 64ms) the solution functions as a full TAP LEC.
The Sparse line echo cancelling solution is available in the form of object codes for TI's C55x DSP and in the form of C code that could be ported to other platforms. Request a free brochure from Kane Computing ...
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