FR2217754A2 - Compander for reproducing speech or sound signals - Google Patents
Compander for reproducing speech or sound signalsInfo
- Publication number
- FR2217754A2 FR2217754A2 FR7404532A FR7404532A FR2217754A2 FR 2217754 A2 FR2217754 A2 FR 2217754A2 FR 7404532 A FR7404532 A FR 7404532A FR 7404532 A FR7404532 A FR 7404532A FR 2217754 A2 FR2217754 A2 FR 2217754A2
- Authority
- FR
- France
- Prior art keywords
- compander
- sound signals
- reproducing speech
- speech
- reproducing
- 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
Links
- 230000005236 sound signal Effects 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/10—Control of transmission; Equalising by pilot signal
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/04—Time compression or expansion
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/26—Time-delay networks
- H03H11/265—Time-delay networks with adjustable delay
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
- H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
- H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
- H03K4/50—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor
- H03K4/501—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator
- H03K4/502—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator the capacitor being charged from a constant-current source
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/08—Duration or width modulation ; Duty cycle modulation
-
- 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
- H04B1/66—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 reducing bandwidth of signals; for improving efficiency of transmission
-
- 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
- H04B1/66—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 reducing bandwidth of signals; for improving efficiency of transmission
- H04B1/662—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 reducing bandwidth of signals; for improving efficiency of transmission using a time/frequency relationship, e.g. time compression or expansion
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Quality & Reliability (AREA)
- Computational Linguistics (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
Plays back speech or sound recording at speed which equals or differs from recording speed
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17157171A | 1971-08-13 | 1971-08-13 | |
US22403572A | 1972-02-07 | 1972-02-07 | |
US00331550A US3828361A (en) | 1971-08-13 | 1973-02-12 | Speech compressor-expander |
US00331536A US3846827A (en) | 1973-02-12 | 1973-02-12 | Speech compressor-expander with signal sample zero reset |
US430911A US3869708A (en) | 1971-08-13 | 1974-01-14 | Speech compressor with gap filling |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2217754A2 true FR2217754A2 (en) | 1974-09-06 |
FR2217754B2 FR2217754B2 (en) | 1977-09-23 |
Family
ID=27538844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7404532A Granted FR2217754A2 (en) | 1971-08-13 | 1974-02-11 | Compander for reproducing speech or sound signals |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2217754A2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2150067A5 (en) * | 1971-08-13 | 1973-03-30 | Greenberg Sanford |
-
1974
- 1974-02-11 FR FR7404532A patent/FR2217754A2/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2150067A5 (en) * | 1971-08-13 | 1973-03-30 | Greenberg Sanford |
Also Published As
Publication number | Publication date |
---|---|
FR2217754B2 (en) | 1977-09-23 |
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