JPS5535519A - Digital speak voice inserting system - Google Patents

Digital speak voice inserting system

Info

Publication number
JPS5535519A
JPS5535519A JP10834678A JP10834678A JPS5535519A JP S5535519 A JPS5535519 A JP S5535519A JP 10834678 A JP10834678 A JP 10834678A JP 10834678 A JP10834678 A JP 10834678A JP S5535519 A JPS5535519 A JP S5535519A
Authority
JP
Japan
Prior art keywords
voice
signal
freeze out
digital
dsi
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP10834678A
Other languages
Japanese (ja)
Other versions
JPS5947903B2 (en
Inventor
Yotaro Hachitsuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP10834678A priority Critical patent/JPS5947903B2/en
Priority to US06/071,255 priority patent/US4303803A/en
Publication of JPS5535519A publication Critical patent/JPS5535519A/en
Publication of JPS5947903B2 publication Critical patent/JPS5947903B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/17—Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
    • H04J3/172—Digital speech interpolation, i.e. DSI

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To realize a digital speak voice insertion (DSI) system capable of appropriately absorving freeze out taking place on voice insertion. CONSTITUTION:A non-linear PCM signal NL is converted into linear PCM signal L through a expander 1, and separates data, and only a voice signal goes on DSI channel CH. And, a signal from a buffer 2 enters into a variable bit type ADPCM encoder 5 through the CH. On the other hand, a voice detector 3 detects presence of voice every specified unit block, at presence time, predicts acceptability of its signal to quantization noise ratio (S/Ng), this acceptability information is conveyed to a bit length controller in the encoder 5, when freeze out seems to take place, reduction of bit is implemented from what has good S/Ng, it is gathered to form a new channel, the freeze out is avoided and integrated gain is also improved.
JP10834678A 1978-08-31 1978-09-04 Digital call audio introduction method Expired JPS5947903B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP10834678A JPS5947903B2 (en) 1978-09-04 1978-09-04 Digital call audio introduction method
US06/071,255 US4303803A (en) 1978-08-31 1979-08-30 Digital speech interpolation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10834678A JPS5947903B2 (en) 1978-09-04 1978-09-04 Digital call audio introduction method

Publications (2)

Publication Number Publication Date
JPS5535519A true JPS5535519A (en) 1980-03-12
JPS5947903B2 JPS5947903B2 (en) 1984-11-22

Family

ID=14482361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10834678A Expired JPS5947903B2 (en) 1978-08-31 1978-09-04 Digital call audio introduction method

Country Status (1)

Country Link
JP (1) JPS5947903B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5696550A (en) * 1979-10-26 1981-08-04 Western Electric Co Signal sorting device
JPS5791046A (en) * 1980-10-03 1982-06-07 Northern Telecom Ltd Method and device for tasi including calling wire
JPS59216342A (en) * 1983-05-23 1984-12-06 Mitsubishi Electric Corp Digital sound inserting device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5696550A (en) * 1979-10-26 1981-08-04 Western Electric Co Signal sorting device
JPS5791046A (en) * 1980-10-03 1982-06-07 Northern Telecom Ltd Method and device for tasi including calling wire
JPS59216342A (en) * 1983-05-23 1984-12-06 Mitsubishi Electric Corp Digital sound inserting device

Also Published As

Publication number Publication date
JPS5947903B2 (en) 1984-11-22

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