JPH0221957U - - Google Patents
Info
- Publication number
- JPH0221957U JPH0221957U JP10035888U JP10035888U JPH0221957U JP H0221957 U JPH0221957 U JP H0221957U JP 10035888 U JP10035888 U JP 10035888U JP 10035888 U JP10035888 U JP 10035888U JP H0221957 U JPH0221957 U JP H0221957U
- Authority
- JP
- Japan
- Prior art keywords
- data
- circuit
- modulation
- demodulation
- audio data
- 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
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000003786 synthesis reaction Methods 0.000 claims description 5
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Time-Division Multiplex Systems (AREA)
Description
第１図は本考案の基本的構成を示す図、第２図
は実施例装置のシステム回路図、第３図は左右チ
ヤンネルのデイジタル音声データと伝送されるデ
イジタル音声データとをビツトストリームで表現
し、合成／分解におけるビツトの対応関係を示し
た図である。
１，２……Ａ／Ｄ―Ｄ／Ａ変換器、３，４……
ＰＣＭ変復調回路、５……通信制御回路、６……
網制御回路、７……データ合成回路、８……デー
タ分解回路、９……送受切換え制御手段。
Fig. 1 is a diagram showing the basic configuration of the present invention, Fig. 2 is a system circuit diagram of the embodiment device, and Fig. 3 is a representation of digital audio data of the left and right channels and the digital audio data to be transmitted as a bit stream. , is a diagram showing the correspondence of bits in synthesis/decomposition. 1, 2...A/D-D/A converter, 3, 4...
PCM modulation/demodulation circuit, 5... Communication control circuit, 6...
Network control circuit, 7...data synthesis circuit, 8...data decomposition circuit, 9...transmission/reception switching control means.
Claims (1)
変換し、デイジタル音声データをアナログ音声デ
ータに変換する左右２チヤンネルのＡ／Ｄ―Ｄ／
Ａ変換器と、 各Ａ／Ｄ―Ｄ／Ａ変換器に接続され、ＩＳＤＮ
伝送周波数の１／２の周波数でＰＣＭ方式による
データの変復調を実行する左右２チヤンネルのＰ
ＣＭ変復調回路と、 ＩＳＤＮと同ネツトワーク用フレームによる通
信を実行する通信制御回路と、 ＩＳＤＮのチヤンネル制御を実行する網制御回
路と、 両ＰＣＭ変復調回路の変調系から入力される左
右２チヤンネルの送信デイジタル音声データを時
分割方式で合成して通信制御回路へ転送するデー
タ合成回路と、 通信制御回路から入力される左右２チヤンネル
の受信デイジタル音声データを時分割方式で分解
して両ＰＣＭ変復調回路の復調系へ分配転送する
データ分解回路と、 送信／受信において、両Ａ／Ｄ―Ｄ／Ａ変換器
、両ＰＣＭ変復調回路、データ合成回路、及びデ
ータ分解回路の動作切換えを行なう送受切換え制
御手段 とを具備したことを特徴とするＩＳＤＮ用音声端
末装置。[Claims for Utility Model Registration] Two-channel left and right A/D-D/ that converts analog audio data to digital audio data and converts digital audio data to analog audio data.
A converter, connected to each A/D-D/A converter, and ISDN
P of two left and right channels that performs data modulation and demodulation using the PCM method at a frequency that is 1/2 of the transmission frequency.
A CM modulation/demodulation circuit, a communication control circuit that performs communication using frames for ISDN and the same network, a network control circuit that performs ISDN channel control, and transmission of two left and right channels input from the modulation systems of both PCM modulation and demodulation circuits. A data synthesis circuit synthesizes digital audio data in a time-division manner and transfers it to the communication control circuit, and a data synthesis circuit that decomposes the received digital voice data of the two left and right channels input from the communication control circuit in a time-division manner and transfers the data to both PCM modulation and demodulation circuits. a data decomposition circuit that distributes and transfers data to a demodulation system; and a transmission/reception switching control means that switches operations of both A/D-D/A converters, both PCM modulation and demodulation circuits, a data synthesis circuit, and a data decomposition circuit in transmission/reception. An ISDN voice terminal device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10035888U JPH0741245Y2 (en) | 1988-07-28 | 1988-07-28 | Voice terminal for ISDN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10035888U JPH0741245Y2 (en) | 1988-07-28 | 1988-07-28 | Voice terminal for ISDN |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0221957U true JPH0221957U (en) | 1990-02-14 |
| JPH0741245Y2 JPH0741245Y2 (en) | 1995-09-20 |
Family
ID=31328363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10035888U Expired - Lifetime JPH0741245Y2 (en) | 1988-07-28 | 1988-07-28 | Voice terminal for ISDN |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741245Y2 (en) |
-
1988
- 1988-07-28 JP JP10035888U patent/JPH0741245Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0741245Y2 (en) | 1995-09-20 |
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