JPS55104130A - Monitor system for pcm coder and decoder - Google Patents
Monitor system for pcm coder and decoderInfo
- Publication number
- JPS55104130A JPS55104130A JP1159779A JP1159779A JPS55104130A JP S55104130 A JPS55104130 A JP S55104130A JP 1159779 A JP1159779 A JP 1159779A JP 1159779 A JP1159779 A JP 1159779A JP S55104130 A JPS55104130 A JP S55104130A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- monitor
- period
- effect
- fundamental
- 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
Landscapes
- Analogue/Digital Conversion (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
PURPOSE:To avoid the effect on the audio signal, by taking the period as a half the sampling frequency and using the signal in long period so that the change in the amplitude is outside the signal band, as the monitor signal to monitor the operation of coders and the like. CONSTITUTION:Since the fundamental period T1 of a monitor signal is selected to 1/2 of the fundamental period at one time slot of the decoder CODEC, the folding signal by sampling gives no effect on the audio signal fed in the time slot. Since the monitor signal of positive and negative in the same level is alternately fed, the crosstalk due to distortion of the waveform of a PAM signal decoded is cancelled because of inverted positive and negative monitor signals. Further, the level repetitive period T2 of monitor signal and the fundamental repetitive period T3 are selected sufficiently lower than that in the audio band, no crosstalk of monitor signal gives effect to the audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1159779A JPS5930345B2 (en) | 1979-02-02 | 1979-02-02 | PCM encoder/decoder monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1159779A JPS5930345B2 (en) | 1979-02-02 | 1979-02-02 | PCM encoder/decoder monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55104130A true JPS55104130A (en) | 1980-08-09 |
| JPS5930345B2 JPS5930345B2 (en) | 1984-07-26 |
Family
ID=11782307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1159779A Expired JPS5930345B2 (en) | 1979-02-02 | 1979-02-02 | PCM encoder/decoder monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5930345B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0758639A (en) * | 1993-07-05 | 1995-03-03 | Natl Sci Council | Inspection module structure of high resolution analog-to-digital converter |
-
1979
- 1979-02-02 JP JP1159779A patent/JPS5930345B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0758639A (en) * | 1993-07-05 | 1995-03-03 | Natl Sci Council | Inspection module structure of high resolution analog-to-digital converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5930345B2 (en) | 1984-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Effective date: 20040430 Free format text: JAPANESE INTERMEDIATE CODE: A621 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20060221 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20060518 |
|
| A602 | Written permission of extension of time |
Effective date: 20060703 Free format text: JAPANESE INTERMEDIATE CODE: A602 |
|
| A313 | Final decision of rejection without a dissenting response from the applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A313 Effective date: 20061002 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20061107 |