GB1572582A - Circuit and method for digitally measuring signal level of pcm encoded signals - Google Patents

Circuit and method for digitally measuring signal level of pcm encoded signals Download PDF

Info

Publication number
GB1572582A
GB1572582A GB4700/78A GB470078A GB1572582A GB 1572582 A GB1572582 A GB 1572582A GB 4700/78 A GB4700/78 A GB 4700/78A GB 470078 A GB470078 A GB 470078A GB 1572582 A GB1572582 A GB 1572582A
Authority
GB
United Kingdom
Prior art keywords
signal
samples
circuit
power
output signal
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.)
Expired
Application number
GB4700/78A
Other languages
English (en)
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of GB1572582A publication Critical patent/GB1572582A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
GB4700/78A 1977-03-03 1978-02-06 Circuit and method for digitally measuring signal level of pcm encoded signals Expired GB1572582A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA273,147A CA1068408A (en) 1977-03-03 1977-03-03 Circuit and method for digitally measuring signal levels, of pcm encoded signals

Publications (1)

Publication Number Publication Date
GB1572582A true GB1572582A (en) 1980-07-30

Family

ID=4108070

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4700/78A Expired GB1572582A (en) 1977-03-03 1978-02-06 Circuit and method for digitally measuring signal level of pcm encoded signals

Country Status (7)

Country Link
JP (1) JPS6052379B2 (enrdf_load_stackoverflow)
CA (1) CA1068408A (enrdf_load_stackoverflow)
DE (1) DE2808849A1 (enrdf_load_stackoverflow)
FR (1) FR2382807A1 (enrdf_load_stackoverflow)
GB (1) GB1572582A (enrdf_load_stackoverflow)
NL (1) NL190462C (enrdf_load_stackoverflow)
SE (1) SE435666B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022152A1 (en) * 1991-06-07 1992-12-10 Australian And Overseas Telecommunications Corporation Limited Pcm monitor
AU644301B2 (en) * 1991-06-07 1993-12-02 Telstra Corporation Limited PCM monitor
GB2365725A (en) * 2000-03-16 2002-02-20 Agere Syst Guardian Corp Method of determining whether A-law or mu-law encoding is applied

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593924B1 (fr) * 1986-01-24 1988-04-08 Cit Alcatel Procede et dispositif de mesure de la puissance efficace apres filtrage passe-haut d'un signal echantillonne

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057972A (en) * 1959-12-23 1962-10-09 Bell Telephone Labor Inc Testing the performance of pcm receivers
CH495094A (de) * 1968-08-12 1970-08-15 Standard Telephon & Radio Ag Verfahren zur Überwachung der Arbeitsweise von Coder- und Decoderschaltungen in einer PCM-Zeitmultiplex-Anlage
CH545560A (enrdf_load_stackoverflow) * 1971-05-06 1974-01-31
JPS5236406B2 (enrdf_load_stackoverflow) * 1972-01-17 1977-09-16

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022152A1 (en) * 1991-06-07 1992-12-10 Australian And Overseas Telecommunications Corporation Limited Pcm monitor
GB2261801A (en) * 1991-06-07 1993-05-26 Australian & Overseas Telecom Pcm monitor
AU644301B2 (en) * 1991-06-07 1993-12-02 Telstra Corporation Limited PCM monitor
GB2261801B (en) * 1991-06-07 1994-01-05 Australian & Overseas Telecom PCM monitor
GB2365725A (en) * 2000-03-16 2002-02-20 Agere Syst Guardian Corp Method of determining whether A-law or mu-law encoding is applied
GB2365725B (en) * 2000-03-16 2002-12-11 Agere Syst Guardian Corp Detecting encoding and encoding conversion for modem connections
US6693967B1 (en) 2000-03-16 2004-02-17 Agere Systems Inc. Detecting encoding and encoding conversion for modem connections

Also Published As

Publication number Publication date
SE435666B (sv) 1984-10-08
CA1068408A (en) 1979-12-18
DE2808849A1 (de) 1978-09-07
FR2382807A1 (fr) 1978-09-29
SE7802261L (sv) 1978-09-04
DE2808849C2 (enrdf_load_stackoverflow) 1988-03-31
NL190462C (nl) 1994-03-01
FR2382807B3 (enrdf_load_stackoverflow) 1980-12-05
NL190462B (nl) 1993-10-01
NL7801094A (nl) 1978-09-05
JPS6052379B2 (ja) 1985-11-19
JPS53109677A (en) 1978-09-25

Similar Documents

Publication Publication Date Title
US4352182A (en) Method of and device for testing the quality of digital speech-transmission equipment
US4185172A (en) Method of and means for detecting digitized multi frequency-coded signals
US4109111A (en) Method and apparatus for establishing conference calls in a time division multiplex pulse code modulation switching system
US4191858A (en) Block digital processing system for nonuniformly encoded digital words
GB2049360A (en) Digital signal processing system
US4264974A (en) Optimized digital delta modulation compander having truncation effect error recovery
CA1068408A (en) Circuit and method for digitally measuring signal levels, of pcm encoded signals
CA1287376C (en) Processor based linked compressor-expander telecommunications system
US4103108A (en) Circuit and method for digitally measuring signal levels of pcm encoded signals
JPS5916456B2 (ja) デジタル差動位相変調装置
EP0379586A1 (en) Signal processor
JPS5942502B2 (ja) デジタル式電話回線用の利得制御装置
US4062014A (en) Natural binary to logarithmic binary conversion device with means for range selection
US4040049A (en) Tandem block digital processor for use with nonuniformly encoded digital data
US4349707A (en) System for measuring the attenuation on a transmission path
US3891805A (en) Digital signal detection in telephonic communication systems
JP3198224B2 (ja) 通話回線のエコー測定装置
US3911225A (en) Method and device for checking and adjusting a PCM transmission device
SU1053308A1 (ru) Способ измерени характеристики квантовани приемника сигналов с импульсно-кодовой модул цией
KR930006546B1 (ko) 디지틀 신호처리기를 이용한 다중채널 r2mfc/dtmf/cct 겸용 수신방법
KR100416125B1 (ko) 퀵 퓨리에 변환을 이용한 티디엑스 계열신호서비스시스템의 신호상태 분석장치 및 분석방법
EP0528650B1 (en) Circuit for digitally adding loss to a signal
US3637942A (en) Constant quantizing scale method of transmitting a signal
JP3468196B2 (ja) 音声回線試験装置と音声回線試験回路
Wolters Enhancement of differentially coded speech signals by means of quantization error correction

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19980205