JPS57115043A - Transmission device for converting orthogonal code - Google Patents
Transmission device for converting orthogonal codeInfo
- Publication number
- JPS57115043A JPS57115043A JP151681A JP151681A JPS57115043A JP S57115043 A JPS57115043 A JP S57115043A JP 151681 A JP151681 A JP 151681A JP 151681 A JP151681 A JP 151681A JP S57115043 A JPS57115043 A JP S57115043A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- sequence
- quantized
- signal
- converter
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L23/00—Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00
- H04L23/02—Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00 adapted for orthogonal signalling
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Analogue/Digital Conversion (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
PURPOSE:To enhance the correction capability, by compressing and transmitting separately a specially important sequence signal and by substituting a sequence signal, where an error occurs, with the separately transmitted signal. CONSTITUTION:An input signal 1 is quantized by an A/D converter 2, and sample values are written in a circuit 3 for samll blocks. Blocked sample values X1-X4 are converted to biquadratic sequence signals h1-h4 by an H converter 4. Respective sequence signals are quantized with an optimum bit distribution by a quantizer 5 to obtain quantized signals q1h1-q4h4. The most important sequence signal h1 is written in a circuit 21 for large block. Blocked sequence signals b1-b4 are converted to biquadratic sequence signals H1-H4by an H converter 22. Sequence signals H1-H4 are quantized with an optimum bit distribution by a quantizer 23 to obtain quantized signals Q1H1-Q4H4. These quantized signals q1h1-q4h4 and Q1H1-Q4H4 are synthesized by a synthesizing circuit 20 and are supplied to a transmission line 7 through an encoder 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP151681A JPS57115043A (en) | 1981-01-07 | 1981-01-07 | Transmission device for converting orthogonal code |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP151681A JPS57115043A (en) | 1981-01-07 | 1981-01-07 | Transmission device for converting orthogonal code |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57115043A true JPS57115043A (en) | 1982-07-17 |
Family
ID=11503648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP151681A Pending JPS57115043A (en) | 1981-01-07 | 1981-01-07 | Transmission device for converting orthogonal code |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57115043A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60172894A (en) * | 1983-09-29 | 1985-09-06 | シツプ−ソシエタ・イタリア−ナ・ペル・レセルチツイオ・テレフオニコ・ピ−・ア− | Transmitting and/or receiving coder/decoder for television image through digital low speed channel |
| JPH0548906A (en) * | 1991-08-16 | 1993-02-26 | Mitsubishi Electric Corp | Multidimensional orthogonal conversion encoder for image signal |
| WO1998010591A1 (en) * | 1996-09-02 | 1998-03-12 | Kabushiki Kaisha Toshiba | Information transmitting method, encoder/decoder of information transmitting system using the method, and encoding multiplexer/decoding inverse multiplexer |
-
1981
- 1981-01-07 JP JP151681A patent/JPS57115043A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60172894A (en) * | 1983-09-29 | 1985-09-06 | シツプ−ソシエタ・イタリア−ナ・ペル・レセルチツイオ・テレフオニコ・ピ−・ア− | Transmitting and/or receiving coder/decoder for television image through digital low speed channel |
| JPH0548906A (en) * | 1991-08-16 | 1993-02-26 | Mitsubishi Electric Corp | Multidimensional orthogonal conversion encoder for image signal |
| WO1998010591A1 (en) * | 1996-09-02 | 1998-03-12 | Kabushiki Kaisha Toshiba | Information transmitting method, encoder/decoder of information transmitting system using the method, and encoding multiplexer/decoding inverse multiplexer |
| US6876676B2 (en) | 1996-09-02 | 2005-04-05 | Kabushiki Kaisha Toshiba | Information transmission method and encoding/decoding apparatus and encoding-multiplexing/decoding-demultiplexing apparatus in information transmission system to which information transmission method is applied |
| US6952432B2 (en) | 1996-09-02 | 2005-10-04 | Kabushiki Kaisha Toshiba | Information transmission method and encoding/decoding apparatus and encoding- multiplexing/decoding- demultiplexing apparatus in information transmission system to which information transmission method is applied |
| US6959018B2 (en) | 1996-09-02 | 2005-10-25 | Kabushiki Kaisha Toshiba | Information transmission method and encoding/decoding apparatus and encoding-multiplexing/decoding-demultiplexing apparatus in information transmission system to which information transmission method is applied |
| US6961354B2 (en) | 1996-09-02 | 2005-11-01 | Kabushiki Kaisha Toshiba | Information transmission method and encoding/decoding apparatus and encoding-multiplexing/decoding-demultiplexing apparatus in information transmission system in which information transmission method is applied |
| US7002999B2 (en) | 1996-09-02 | 2006-02-21 | Kabushiki Kaisha Toshiba | Information transmission method and encoding/decoding apparatus and encoding-multiplexing/decoding-demultiplexing apparatus in information transmission system to which information transmission method is applied |
| US7010003B2 (en) | 1996-09-02 | 2006-03-07 | Kabushiki Kaisha Toshiba | Information transmission method and encoding/decoding apparatus and encoding-multiplexing/decoding-demultiplexing apparatus in information transmission system to which information transmission method is applied |
| US7269170B2 (en) | 1996-09-02 | 2007-09-11 | Kabushiki Kaisha Toshiba | Information transmission method and encoding/decoding apparatus and encoding-multiplexing/decoding-demultiplexing apparatus in information transmission system to which information transmission method is applied |
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