KR970064073A - Pulse code modulation decoder for digital keyphone terminal - Google Patents
Pulse code modulation decoder for digital keyphone terminal Download PDFInfo
- Publication number
- KR970064073A KR970064073A KR1019960003048A KR19960003048A KR970064073A KR 970064073 A KR970064073 A KR 970064073A KR 1019960003048 A KR1019960003048 A KR 1019960003048A KR 19960003048 A KR19960003048 A KR 19960003048A KR 970064073 A KR970064073 A KR 970064073A
- Authority
- KR
- South Korea
- Prior art keywords
- digital
- output
- unit
- pulse code
- pass filter
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
Abstract
디지탈 통신망에서 디지탈 키폰 단말용 펄스 코드 변조 복호 장치에 관한 것이다.To a pulse code modulation and decoding apparatus for a digital key phone terminal in a digital communication network.
수신되는 직렬 데이터를 병렬 데이터로 변환하는 직렬-병렬 데이터 변환부, 상기 병렬 데이타를 펄스 코드 변조 복호하는 펄스 코드 변조 복호부, 상기 복호부의 출력의 데이터를 보간하는 보간부, 상기 보간부의 출력을 디지탈 변조하는 변조부, 상기 변조부 출력을 디지탈 신호에서 아날로그 신호로 변환하는 1비트 디지탈-아나로그 변환부, 상기 1비트 디지탈 -아날로그 변환부의 출력을 입력으로 하여 잡음을 제거하는 저역 통과 필터부 및, 상기 저역 통과 필터부의 출력을 입력으로 하여 이득을 제어하는 이득 제어부를 포함하여 스피커 출력과 이어폰의 출력 경로를 아날로그 신호에서 분리하여 수신단의 저역 통과 필터와 디지탈-아날로그 변환부를 하나로 통합하는 것을 특징으로 한다.A serial-to-parallel data converter for converting received serial data into parallel data; a pulse code modulation decoder for pulse-code-modulating and decoding the parallel data; an interpolator for interpolating data of the output of the decoder; Digital Modulating A modulation unit, A 1-bit digital-analog converter for converting the output of the modulator to an analog signal, a low-pass filter for removing noise by taking the output of the 1-bit digital-analog converter as an input, And a gain control unit for controlling the gain of the low pass filter and the digital-analog conversion unit of the receiving terminal by separating the speaker output and the output path of the earphone from the analog signal.
본 발명에 의하면 이어폰과 스피커 폰 경로를 아날로그 부에서 분리함으로써, 수신단의 저역 통과 필터와 디지탈-아날로그 변환부를 하나로 통합할 수 있는 효과가 있다.According to the present invention, it is possible to integrate the low-pass filter and the digital-analog conversion unit of the receiving end into one by separating the earphone and the speaker phone path from the analog unit.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.
제1도는 본 발명에 의한 디지탈 키폰 단말용 펄스 코드 변조 복호 장치의 구성도.FIG. 1 is a block diagram of a pulse code modulation and decoding apparatus for a digital keyphone terminal according to the present invention; FIG.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960003048A KR0183821B1 (en) | 1996-02-08 | 1996-02-08 | Pulse code modulation decode/code device for digital keyphone terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960003048A KR0183821B1 (en) | 1996-02-08 | 1996-02-08 | Pulse code modulation decode/code device for digital keyphone terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970064073A true KR970064073A (en) | 1997-09-12 |
| KR0183821B1 KR0183821B1 (en) | 1999-05-15 |
Family
ID=19450938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960003048A KR0183821B1 (en) | 1996-02-08 | 1996-02-08 | Pulse code modulation decode/code device for digital keyphone terminal |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0183821B1 (en) |
-
1996
- 1996-02-08 KR KR1019960003048A patent/KR0183821B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR0183821B1 (en) | 1999-05-15 |
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| E701 | Decision to grant or registration of patent right | ||
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Payment date: 20111129 Year of fee payment: 14 |
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| LAPS | Lapse due to unpaid annual fee |