G.723.1 Vocoder with Switchable Transmission Rates

Toronto, Canada – GAO Research Corporation. (world wide web.GAOResearch.com) has released its G.723.1 vocoder, a dual rate speech coder, that is readily available for programs for example video phones, audio/interactive video and media gateways.

This G.723.1 dual rate speech coder works compression and decompression of 8 kHz speech signals. It encodes 16-bit PCM samples into 16-bit code-words yielding 10 or 12 code-words per 240 sample frames for that 5.3 killerbytes per second and 6.3 killerbytes per second channels correspondingly.

GAO’s G.723.1 software has switchable transmission rates over 5.3 or 6.3 killerbytes per second channels supplying 4 kHz of quality speech bandwidth in conformance using the ITU-T standard. The greater bit rate has greater quality the low bit rate gives top quality and offers system designers with a lot more versatility.

The ITU-T G.723.1 standard identifies a coded representation you can use for blending it or any other audio signal element of multimedia services in a really low bit rate included in the overall H.324 group of standards.

It encodes speech or any other audio signals in frames using linear predictive analysis-by-synthesis coding. The excitation signal for that high rate coder is Multipulse Maximum Likelihood Quantization (Mega pixel-MLQ) but for the low rate coder is Algebraic-Code-Excited Linear-Conjecture (ACELP).

Furthermore, Silence Compression Plan and Voice Activity Recognition (VAD) will also be incorporated within this version.

This G.723.1 vocoder goes to GAO’s group of Speech Vocoders. This line includes a multitude of vocoders for example G.722.1 Vocoder and G.729, G.729A and G.729AB Speech Vocoder which is fantastic for visual telephony, wireless communications, and digital satellite communication systems along with other similar items.

About GAO Research Corporation. GAO Research Corporation. (world wide web.GAOResearch.com) is really a recognized worldwide leading provider of communications software to telecom and electronics companies and offers probably the most comprehensive and different suite of modem, fax, telephony, speech software, Voice over internet protocol, FoIP, fax relay and fax/modem/voice relay software for embedded programs for DSP and microprocessors.

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