JPS55158754A - Codec - Google Patents
CodecInfo
- Publication number
- JPS55158754A JPS55158754A JP6582979A JP6582979A JPS55158754A JP S55158754 A JPS55158754 A JP S55158754A JP 6582979 A JP6582979 A JP 6582979A JP 6582979 A JP6582979 A JP 6582979A JP S55158754 A JPS55158754 A JP S55158754A
- Authority
- JP
- Japan
- Prior art keywords
- clock signal
- frequency
- external clock
- external
- division ratio
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Analogue/Digital Conversion (AREA)
- Communication Control (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
PURPOSE:To secure the general-purpose properties as well as reduce the number of external connection pins, by detecting the frequency to the several types of external clock signals and then dividing the frequency after setting the frequency division ratio in order to produce the constant conversion clock at all times. CONSTITUTION:Counter part 11 detects the frequency of the external clock signal which is applied through input terminal 2 and then normalizes the external clock signal in a period of the synchronous pulse and every N-count. Thus the carry signal is produced to be sent to control logic part 12. Part 12 decides the division ratio for division of the external clock signal and in accordance with the frequency of the external clock signal detected. Then the external clock signal is divided at variable divider part 13 and in accordance with the above division ratio. Thus the constant internal conversion clock signal frequency can be obtained to the several types of external clock signal frequencies. And then the general-purpose properties is obtained by always securing the constant function for both the coding and encoding. At the same time, the number of the external connection pins can be reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6582979A JPS55158754A (en) | 1979-05-28 | 1979-05-28 | Codec |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6582979A JPS55158754A (en) | 1979-05-28 | 1979-05-28 | Codec |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55158754A true JPS55158754A (en) | 1980-12-10 |
| JPS6126255B2 JPS6126255B2 (en) | 1986-06-19 |
Family
ID=13298296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6582979A Granted JPS55158754A (en) | 1979-05-28 | 1979-05-28 | Codec |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55158754A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012023417A (en) * | 2010-07-12 | 2012-02-02 | Panasonic Corp | Clock reproduction circuit and digital audio reproducer using it |
| JP2013153409A (en) * | 2011-12-28 | 2013-08-08 | Panasonic Corp | Clock regeneration circuit and digital audio reproduction apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01130946U (en) * | 1988-03-02 | 1989-09-06 | ||
| JPH0642679U (en) * | 1992-11-13 | 1994-06-07 | 積水化成品工業株式会社 | Hanging container |
-
1979
- 1979-05-28 JP JP6582979A patent/JPS55158754A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012023417A (en) * | 2010-07-12 | 2012-02-02 | Panasonic Corp | Clock reproduction circuit and digital audio reproducer using it |
| JP2013153409A (en) * | 2011-12-28 | 2013-08-08 | Panasonic Corp | Clock regeneration circuit and digital audio reproduction apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6126255B2 (en) | 1986-06-19 |
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