WO2001024549A3 - Voice over pcm technique providing compatibility between pcm data and lower rate vocoder data - Google Patents

Voice over pcm technique providing compatibility between pcm data and lower rate vocoder data Download PDF

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Publication number
WO2001024549A3
WO2001024549A3 PCT/US2000/026408 US0026408W WO0124549A3 WO 2001024549 A3 WO2001024549 A3 WO 2001024549A3 US 0026408 W US0026408 W US 0026408W WO 0124549 A3 WO0124549 A3 WO 0124549A3
Authority
WO
WIPO (PCT)
Prior art keywords
data stream
pcm
data
bits
next step
Prior art date
Application number
PCT/US2000/026408
Other languages
French (fr)
Other versions
WO2001024549A2 (en
Inventor
Ryan Heidari
Original Assignee
Nokia Mobile Phones Ltd
Ryan Heidari
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Mobile Phones Ltd, Ryan Heidari filed Critical Nokia Mobile Phones Ltd
Priority to AU76157/00A priority Critical patent/AU7615700A/en
Publication of WO2001024549A2 publication Critical patent/WO2001024549A2/en
Publication of WO2001024549A3 publication Critical patent/WO2001024549A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/253—Telephone sets using digital voice transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/253—Telephone sets using digital voice transmission
    • H04M1/2535—Telephone sets using digital voice transmission adapted for voice communication over an Internet Protocol [IP] network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

A method and system are disclosed for transmitting a digital representation of voice data. A first step of the method includes sampling and digitizing a voice signal and generating a first data stream having a bit rate of X bits per second (e.g., 4kbps or lower). A next step converts the first data stream to a second data stream having a bit rate of Y bits per second (e.g., a 64kbps PCM data stream). A next step overlays individual ones of bits of the first data stream onto predetermined ones of bits of the second data stream (the Q0 bits of preferably, every other PCM sample) to form a modified data stream (a VoPCM data stream in accordance with this invention). A next step transmits the modified data stream to a receiver, such as through a circuit-switched PSTN connection and/or a packet-switched TCP/IP (Internet) connection. The method further includes a step of processing the received modified data stream. In one embodiment the receiver extracts the first data stream (desired voice codec data) from the predetermined ones of the bits of the modified data stream, such as from the LSB of every other PCM sample.
PCT/US2000/026408 1999-09-30 2000-09-26 Voice over pcm technique providing compatibility between pcm data and lower rate vocoder data WO2001024549A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU76157/00A AU7615700A (en) 1999-09-30 2000-09-26 Voice over pcm technique providing compatibility between pcm data and lower ratevocoder data

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40915699A 1999-09-30 1999-09-30
US09/409,156 1999-09-30

Publications (2)

Publication Number Publication Date
WO2001024549A2 WO2001024549A2 (en) 2001-04-05
WO2001024549A3 true WO2001024549A3 (en) 2001-10-04

Family

ID=23619273

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/026408 WO2001024549A2 (en) 1999-09-30 2000-09-26 Voice over pcm technique providing compatibility between pcm data and lower rate vocoder data

Country Status (2)

Country Link
AU (1) AU7615700A (en)
WO (1) WO2001024549A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5068899A (en) * 1985-04-03 1991-11-26 Northern Telecom Limited Transmission of wideband speech signals
WO1996032823A1 (en) * 1995-04-13 1996-10-17 Nokia Telecommunications Oy Transcoder with prevention of tandem coding of speech
WO1997029566A1 (en) * 1996-02-08 1997-08-14 Nokia Telecommunications Oy Transmission equipment for an interexchange connection
WO1998028936A1 (en) * 1996-12-05 1998-07-02 Nokia Telecommunications Oy Detection of speech channel back-looping
WO1999005830A1 (en) * 1997-07-21 1999-02-04 Telefonaktiebolaget Lm Ericsson (Publ) Enhanced interworking function for interfacing digital cellular voice and fax protocols and internet protocols

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5068899A (en) * 1985-04-03 1991-11-26 Northern Telecom Limited Transmission of wideband speech signals
WO1996032823A1 (en) * 1995-04-13 1996-10-17 Nokia Telecommunications Oy Transcoder with prevention of tandem coding of speech
WO1997029566A1 (en) * 1996-02-08 1997-08-14 Nokia Telecommunications Oy Transmission equipment for an interexchange connection
WO1998028936A1 (en) * 1996-12-05 1998-07-02 Nokia Telecommunications Oy Detection of speech channel back-looping
WO1999005830A1 (en) * 1997-07-21 1999-02-04 Telefonaktiebolaget Lm Ericsson (Publ) Enhanced interworking function for interfacing digital cellular voice and fax protocols and internet protocols

Also Published As

Publication number Publication date
WO2001024549A2 (en) 2001-04-05
AU7615700A (en) 2001-04-30

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