[특허]Method and appartus for transmitting coded audio signals through a transmission channel with limited bandwidth

Method and appartus for transmitting coded audio signals through a transmission channel with limited bandwidth 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04M-011/00
출원번호	US-0419199 (1995-04-10)
발명자 / 주소	Hinderks Larry
출원인 / 주소	Corporate Computer Systems
대리인 / 주소	McAndrews, Held & Malloy, Ltd.
인용정보	피인용 횟수 : 20 인용 특허 : 0

초록 ▼

A digital audio transmitter system capable of transmitting high quality, wideband speech over a transmission channel with a limited bandwidth such as a traditional telephone line. The digital audio transmitter system includes a coder for coding an input audio signal to a digital signal having a transmission rate that does not exceed the maximum allowable transmission rate for traditional telephone lines and a decoder for decoding the digital signal to provide an output audio signal with an audio bandwidth of wideband speech. A coder and a decoder may be provided in a single device to allow two-way communication between multiple devices.

대표청구항 ▼

[ What is claimed is:] [1.] A portable CODEC for transmitting high quality audio signals over a standard telephone line having a limited bandwidth and a maximum transmission rate, said portable CODEC comprising:a single portable housing;an analog mixer, within the housing, receiving an input audio signal from at least one input line, said audio mixer amplifying and mixing input audio signals to produce a single combined audio input signal;memory, within the housing, storing a lossy compression routine and storing at least one set of predefined psycho-acoustic parameter levels for said compression routine;an encoder, within the housing, converting said single combined audio input signal to a combined digital input signal at a predefined sampling rate and encoding said combined digital input signal based on said lossy compression routine stored in memory to produce a single encoded digital signal having a predefined compression ratio with respect to said single combined audio input signal;an analog modem, with the housing, establishing a connection with, and a transmission rate for, a standard telephone line of a telephone network, said modem converting said encoded digital signal to an encoded analog output signal and outputting said encoded analog output signal at said transmission rate established by said analog modem along the standard telephone line through the telephone network; anda control processor, within the housing, defines said predefined sampling rate for said encoder based on said transmission rate established by said analog modem to enable said analog modem to output said encoded analog output signal at a transmission rate that does not exceed the maximum transmission rate of the telephone line.

이 특허를 인용한 특허 (20)

Hampsten Russ K. ; Solomon Gary A., Adaptive operation of audio peripherals based on the functionality of analog audio interface.
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Hinderks Larry W., Adjustable psycho-acoustic parameters.
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Ramprashad, Sean Anthony; Sundberg, Carl-Erik Wilhelm; Taddei, Herve, Channel coding with unequal error protection for multi-mode source coded information.
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Roberts, Roswell; Lerner, Ian; Teschmacher, Lowell E., Ethernet digital storage (EDS) card and satellite transmission system.
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Roberts, Roswell; Lerner, Ian; Teschmacher, Lowell E., Ethernet digital storage (EDS) card and satellite transmission system.
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Tzong-Da Ho TW; Chien-Ping Huang TW; Jeng-Yuan Lai TW, Externally-embedded heat-dissipating device for ball grid array integrated circuit package.
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Donahue, Paul W.; Dankworth, Jeffrey A.; Hinderks, Larry W.; Fish, Laurence A.; Lerner, Ian A.; Ballister, Thomas C.; Roberts, III, Roswell R., High bandwidth broadcast system having localized multicast access to broadcast content.
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Donahue, Paul W.; Dankworth, Jeffrey A.; Hinderks, Larry W.; Fish, Laurence A.; Lerner, Ian A.; Ballister, Thomas C.; Roberts, III, Roswell R., High bandwidth broadcast system having localized multicast access to broadcast content.
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Nguyen Nghi Nho, Method and apparatus for producing a combined data stream and recovering therefrom the respective user input stream and at least one additional input signal.
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Fish, Laurence A; Teschmacher, Lowell E; Rivero, Anibal-Jose; Roberts, III, Roswell R, Method and apparatus for push and pull distribution of multimedia.
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Fish,Laurence; Teschmacher,Lowell E.; Rivero,Anibal Jose; Roberts,Roswell R., Method and apparatus for push and pull distribution of multimedia.
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Hartnett, Thomas, Method and apparatus for synchronizing data transmission and reception over a network.
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Hinderks Larry, Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth.
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Hinderks, Larry, Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth.
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Hinderks, Larry, Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth.
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Larry Hinderks, Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth.
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Milsted Kenneth Louis ; Nguyen Kha Dinh ; Gong Qing, Method and apparatus to create encoded digital content.
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Robert, III, Roswell; Lerner, Ian; Fish, Laurence A.; Peabody, C. Brian, Satellite receiver/router, system, and method of use.
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Roberts, III,Roswell; Lerner,Ian; Fish,Laurence A.; Peabody,C. Brian, Satellite receiver/router, system, and method of use.
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Anderson Richard Eugene ; Foster Eric M. ; Franklin Dennis Edward, System and method for merging multiple audio streams.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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연합인증

Method and appartus for transmitting coded audio signals through a transmission channel with limited bandwidth 원문보기

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Method and appartus for transmitting coded audio signals through a transmission channel with limited bandwidth 원문보기

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