[특허]Low-rate encoding/digital speech interpolation system

Low-rate encoding/digital speech interpolation system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04J-003/17
출원번호	US-0715696 (1991-06-17)
발명자 / 주소	Gupta Vaikunth N. (Gaithersburg MD) Onufry Jr. Michael (Clarksburg MD) Rieser Jack H. (Middletown MD) Suyderhoud Henri G. (Potomac MD) Virupaksha Krishnamoorthy (Rockville MD)
출원인 / 주소	Comsat (Washington DC 02)
인용정보	피인용 횟수 : 47 인용 특허 : 0

초록

A low-rate encoding/digital speech interpolation (LRE/DSI) system architecture is organized to eliminate the LRE mistracking problem normally associated with DSI-induced speech clipping, to reduce the number of LRE codes required and to provide a mechanism for gradually introducing overload.

대표청구항 ▼

In a speech and data information low-rate encoded, digital speech interpolation communication system, an encoder comprising: (a) means for converting a plurality of serial data streams which are carrying a plurality of active input channels to n-bit samples wherein samples from each input channel are identified by an input channel number; (b) means for translating each of said input channels to an international channel wherein each international channel is identified by an international channel number; (c) means for determining whether said n-bit samples contain speech or data information; (d) means for detecting said data rate of said data information, if data information is present and classifying same; (e) means for delaying said n-bit samples; (f) means for searching a pool of available speech and data transmission channels, said pool consisting of a plurality of transmission channels capable of carrying (n-k)- (n-l) and (n-m)-bits per sample corresponding to data, speech and overload channels, respectively, wherein said transmission channels are identified by transmission channel numbers; (g) means for routing each of said international channels, taking into account whether said n-bit samples contain speech or data information and if data information is present, said data rate, to a selected one of said transmission channels into either (1) its presently assigned transmission channel, if it is presently assigned to a transmission channel, (2) a newly assigned transmission channel if it is not presently assigned a transmission channel, (3) a reassigned transmission channel or (4) a disconnect mode and generating “refresh”, “new assignment”, “reassignment”and “disconnect”messages, respectively; (h) means for routing said messages into an assignment channel; (i) means for steering said n-bit samples associated with its respective international channel to a selected one of a plurality of coders, said plurality of coders making up a pool of available coders, said coders being capable of operating selectively in the (n-k), (n-l) and (n-m)-bit modes wherein (n-k), (n-l) and (n-m-)-bit samples for the selected coder are directed to the selected speech or data transmission channel; (j) means for formatting said encoded samples in transmission channel pairs to form an n-bit word; and (k) means for multiplexing said assignment channel and the transmission channels into a low-rate encoded digital speech interpolation output.

이 특허를 인용한 특허 (47)

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Low-rate encoding/digital speech interpolation system 원문보기

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