JPS56131238A - Pcm system processor - Google Patents
Pcm system processorInfo
- Publication number
- JPS56131238A JPS56131238A JP3534980A JP3534980A JPS56131238A JP S56131238 A JPS56131238 A JP S56131238A JP 3534980 A JP3534980 A JP 3534980A JP 3534980 A JP3534980 A JP 3534980A JP S56131238 A JPS56131238 A JP S56131238A
- Authority
- JP
- Japan
- Prior art keywords
- input
- amplitude
- input signal
- output
- system processor
- 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.)
- Pending
Links
Classifications
-
- 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
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)
Abstract
PURPOSE:To improve the sound quality of a PCM system processor by limiting the amplitude of an input analog signal so that the input signal does not exceed the permissible value of a voltage inputted to an AD converter. CONSTITUTION:Amplitude limiter 10 is that provided in front of LPF1 and limits the amplitude of an input analog signal so that the input signal does not exceed the permissible value of an input voltage to AD converter 3. In this case, when input signal Vin is between Vm and +Vm, output Vout appears as it is and once the absolute value of input signal Vin exceeds Vm, the output amplitude is kept constant as output Vm. Consequently, the sound quality can be improved by preventing a usually generated return noise at the time of an excessive input noise.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3534980A JPS56131238A (en) | 1980-03-18 | 1980-03-18 | Pcm system processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3534980A JPS56131238A (en) | 1980-03-18 | 1980-03-18 | Pcm system processor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56131238A true JPS56131238A (en) | 1981-10-14 |
Family
ID=12439377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3534980A Pending JPS56131238A (en) | 1980-03-18 | 1980-03-18 | Pcm system processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56131238A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59161944A (en) * | 1983-02-23 | 1984-09-12 | ジ−メンス・アクチエンゲゼルシヤフト | Dpcm coder quantizing circuit |
JPH01115224A (en) * | 1987-10-29 | 1989-05-08 | Matsushita Electric Ind Co Ltd | Input protective device |
-
1980
- 1980-03-18 JP JP3534980A patent/JPS56131238A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59161944A (en) * | 1983-02-23 | 1984-09-12 | ジ−メンス・アクチエンゲゼルシヤフト | Dpcm coder quantizing circuit |
JPH01115224A (en) * | 1987-10-29 | 1989-05-08 | Matsushita Electric Ind Co Ltd | Input protective device |
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