JPS55124345A - Transmission system - Google Patents
Transmission systemInfo
- Publication number
- JPS55124345A JPS55124345A JP3151379A JP3151379A JPS55124345A JP S55124345 A JPS55124345 A JP S55124345A JP 3151379 A JP3151379 A JP 3151379A JP 3151379 A JP3151379 A JP 3151379A JP S55124345 A JPS55124345 A JP S55124345A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- quantization
- led
- shift
- levels
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
PURPOSE:To reduce the quantizing distortion by giving the quantization to the information signals by dividing them into several units of level quantum groups featuring the quantization level shift. CONSTITUTION:Waveforms 3 and 4 of signals 1 and 2 are led into quantizers 5 and 5' and then quantized at quantization levels 15 and 16 to be led to coders 6 and 7. In this case, levels 15 and 16 shift by about 1/2 quantum to each other. The signals encoded through encoders 5 and 6 are led to decoders 9 and 10 via track 8 of the memory unit or the transmission line. Decoders 9 and 10 restore the shift of the quanta of the encoded signals for demodulation. The demodulated signal is then regenerated to the original information signal or its related signal through compounder 11. Thus the quantization levels are shifted when the information signal is quantized, and as a result the quantizing distortion of nearly one bit can be reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3151379A JPS55124345A (en) | 1979-03-16 | 1979-03-16 | Transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3151379A JPS55124345A (en) | 1979-03-16 | 1979-03-16 | Transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55124345A true JPS55124345A (en) | 1980-09-25 |
Family
ID=12333282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3151379A Pending JPS55124345A (en) | 1979-03-16 | 1979-03-16 | Transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55124345A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5363026A (en) * | 1976-11-18 | 1978-06-06 | Ricoh Co Ltd | Automatic control device for ex posure amount of electrophotographic copier |
-
1979
- 1979-03-16 JP JP3151379A patent/JPS55124345A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5363026A (en) * | 1976-11-18 | 1978-06-06 | Ricoh Co Ltd | Automatic control device for ex posure amount of electrophotographic copier |
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