FR2221880A1 - Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal - Google Patents

Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal

Info

Publication number
FR2221880A1
FR2221880A1 FR7309104A FR7309104A FR2221880A1 FR 2221880 A1 FR2221880 A1 FR 2221880A1 FR 7309104 A FR7309104 A FR 7309104A FR 7309104 A FR7309104 A FR 7309104A FR 2221880 A1 FR2221880 A1 FR 2221880A1
Authority
FR
France
Prior art keywords
signal
compression
analogue
analogue signal
decompression
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
FR7309104A
Other languages
French (fr)
Other versions
FR2221880B1 (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.)
RADIO DIFFUSION TV FRANCAISE
Original Assignee
RADIO DIFFUSION TV FRANCAISE
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 RADIO DIFFUSION TV FRANCAISE filed Critical RADIO DIFFUSION TV FRANCAISE
Priority to FR7309104A priority Critical patent/FR2221880A1/en
Publication of FR2221880A1 publication Critical patent/FR2221880A1/en
Application granted granted Critical
Publication of FR2221880B1 publication Critical patent/FR2221880B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements

Abstract

The method of improving signal-to-noise ratios of analogue signal may be applied to all types of transmission or recording systems. The signal amplitude is sampled before compression at discreet time intervals and is cooled in digital form. This information is transmitted with the compressed signal and is used in the decompressor to reconstitute the original signal. A clock or timing cct. delivers pulses defining a series of equal time intervals, and there is a short term memory which temporarily stores signal in delay lines for the length of the time intervals determined by the clock.
FR7309104A 1973-03-14 1973-03-14 Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal Granted FR2221880A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7309104A FR2221880A1 (en) 1973-03-14 1973-03-14 Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7309104A FR2221880A1 (en) 1973-03-14 1973-03-14 Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal

Publications (2)

Publication Number Publication Date
FR2221880A1 true FR2221880A1 (en) 1974-10-11
FR2221880B1 FR2221880B1 (en) 1977-12-30

Family

ID=9116290

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7309104A Granted FR2221880A1 (en) 1973-03-14 1973-03-14 Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal

Country Status (1)

Country Link
FR (1) FR2221880A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2445671A1 (en) * 1978-12-28 1980-07-25 Maitre Xavier SYSTEM FOR TRANSMITTING VIA FREQUENCY DIVISION MULTIPLEX TELEPHONE SIGNALS VIA A DIGITAL CHANNEL
EP0018782A1 (en) * 1979-04-25 1980-11-12 Westinghouse Electric Corporation Communication system with digital signal/noise ratio amplifier apparatus
WO1992000637A1 (en) * 1990-06-30 1992-01-09 Telefunken Fernseh Und Rundfunk Gmbh Process for transmitting a time-variable control parameter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2445671A1 (en) * 1978-12-28 1980-07-25 Maitre Xavier SYSTEM FOR TRANSMITTING VIA FREQUENCY DIVISION MULTIPLEX TELEPHONE SIGNALS VIA A DIGITAL CHANNEL
EP0018782A1 (en) * 1979-04-25 1980-11-12 Westinghouse Electric Corporation Communication system with digital signal/noise ratio amplifier apparatus
WO1992000637A1 (en) * 1990-06-30 1992-01-09 Telefunken Fernseh Und Rundfunk Gmbh Process for transmitting a time-variable control parameter

Also Published As

Publication number Publication date
FR2221880B1 (en) 1977-12-30

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Legal Events

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TP Transmission of property
ST Notification of lapse