JPH01248726A - Voice packet communication system - Google Patents
Voice packet communication systemInfo
- Publication number
- JPH01248726A JPH01248726A JP8877189A JP7718988A JPH01248726A JP H01248726 A JPH01248726 A JP H01248726A JP 8877189 A JP8877189 A JP 8877189A JP 7718988 A JP7718988 A JP 7718988A JP H01248726 A JPH01248726 A JP H01248726A
- Authority
- JP
- Japan
- Prior art keywords
- packet
- transmission
- voice
- station
- time
- 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
- 238000004891 communication Methods 0.000 title claims description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000005236 sound signal Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は音声パケット通信方式に関し、特に中継線伝送
時に生じる各パケット毎の揺らぎを除去した音声パケッ
ト通信方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a voice packet communication system, and more particularly to a voice packet communication system that eliminates fluctuations for each packet that occur during trunk line transmission.
従来、音声パケット通信のゆらぎを除去するために、送
信局では音声パケットを中継線へ高速でかつ優先的に送
信し、受信局では受信したパケットにのせられた音声デ
ータをすぐに端末に送信していた。Conventionally, in order to eliminate fluctuations in voice packet communication, the transmitting station transmits voice packets to the trunk line at high speed and with priority, and the receiving station immediately transmits the voice data included in the received packet to the terminal. was.
上述した従来のゆらぎ除去方法では
（イ） 送信局で、中継線上に音声パケットを送信しよ
うとした時に既に別チャンネルの音声パケットが流れて
いれば、そのパケットの送信が終了するまで中継線への
送信を待ち合わせなければならない。In the conventional fluctuation removal method described above, (a) If a transmitting station tries to transmit an audio packet onto a trunk line and an audio packet from another channel is already flowing, the transmission to the trunk line is stopped until the transmission of that packet is completed. I have to wait for the transmission.
（ロ） 中継ルートが異なっている場合は、ル−ト毎に
伝送時間が異なるので、受信局で受信するパケット間の
間隔が実際の送信間隔とは異なる。(b) If the relay routes are different, the transmission time differs depending on the route, so the interval between packets received at the receiving station differs from the actual transmission interval.
などの事情によってゆらぎを完全に除去できないという
欠点がある。The drawback is that fluctuations cannot be completely removed due to such reasons.
本発明の目的は送信間隔データを各パケットに付加して
送信し、受信側ではそれを時間として再生するようにし
て上記の欠点を改善した音声パケット通信方式を提供す
ることにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an audio packet communication system that improves the above-mentioned drawbacks by adding transmission interval data to each packet and transmitting the data, and reproducing it as time on the receiving side.
本発明による音声パケット通信方式は、ディジタル符号
化した音声信号をパケットに載せてやり取りし音声信号
があるレベルより低い場合は無音状態とみなして符号化
しない方式の音声パケット通信において、音声パケット
に送信間隔フィールドを付加し、パケットの送信局では
先頭パケットには前記送信間隔フィールドに０を設定し
、二番目以後のパケットには直前に送出したパケットか
ら経過した時間を前記送信間隔フィールドに設定して受
信局へ送信し、パケットの受信局では受信したパケット
を端末に送信する際にパケットの前記送信フィールドに
設定された時間分だけ直前に送信したパケットから遅ら
せて送信し、各パケットの伝送時間の差により生じる揺
らぎをなくすようにして構成される。The voice packet communication method according to the present invention is a voice packet communication method in which a digitally encoded voice signal is placed in a packet and exchanged, and if the voice signal is lower than a certain level, it is regarded as a silent state and is not encoded. An interval field is added, and the transmitting station of the packet sets the transmission interval field to 0 for the first packet, and sets the time elapsed since the packet sent immediately before in the transmission interval field for the second and subsequent packets. When transmitting the received packet to the terminal, the receiving station delays the previously transmitted packet by the time set in the transmission field of the packet, and then transmits the received packet to the terminal. It is configured to eliminate fluctuations caused by differences.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示す概念図、第２図は音声
パレットのフレーム構成を示す構成図である。FIG. 1 is a conceptual diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing the frame structure of an audio palette.
図において送信局３と受信局５にはそれぞれ端末１およ
び１ａが接続されている。送信局３と受信局５、送信局
３と中継局４、中継局４と受信局５はそれぞれ中継線９
．９ａ、９ｂで接続されている。In the figure, terminals 1 and 1a are connected to a transmitting station 3 and a receiving station 5, respectively. The transmitting station 3 and the receiving station 5, the transmitting station 3 and the relay station 4, and the relay station 4 and the receiving station 5 each have a trunk line 9.
．． They are connected by 9a and 9b.
送信局３は端末１から音声信号を受信したとき、それを
パケット化して受信局５へ直接、または中継局４を経由
して送信する。この時、先頭パケット６なら送信間隔フ
ィールド１２（第２図参照）０を設定し、２番以降のパ
ケット７．８にはその直前に受信局５へ送信した時から
経過した時間すなわち無音間隔（ｔｌ、ｔ２）を設定し
て送信する。When the transmitting station 3 receives the audio signal from the terminal 1, it packetizes it and transmits it to the receiving station 5 directly or via the relay station 4. At this time, for the first packet 6, the transmission interval field 12 (see Figure 2) is set to 0, and for the second and subsequent packets 7.8, the time elapsed since the last transmission to the receiving station 5, that is, the silent interval ( tl, t2) and send.
パケットを受信した受信局５では、先頭パケット６なら
直ちに端末１へ音声信号を送信するが、２番目以降のパ
ケットについては送信間隔フィールド１２に設定されて
いる時間分だけ直前に送信した音声信号から遅らせて端
末へ送信する。The receiving station 5 that receives the packet immediately transmits the audio signal to the terminal 1 if it is the first packet 6, but for the second and subsequent packets, it transmits the audio signal from the previously transmitted audio signal for the time set in the transmission interval field 12. Send to the terminal with a delay.
以上説明したように本発明は、音声パケットの送信局で
送信する音声パケットの時間間隔すなわち無音間隔をパ
ケットの送信間隔フィールドに設定して送信し、パケッ
トの受信局で受信した音声パケットの送信フィールドに
設定された時間間隔だけ遅らせて音声信号を端末へ送信
することにより、ゆらぎを除去する効果がある。As explained above, the present invention sets the time interval, that is, the silence interval, of the audio packet transmitted at the audio packet transmitting station in the transmission interval field of the packet and transmits the audio packet, and the transmission field of the audio packet received at the packet receiving station. By transmitting the audio signal to the terminal with a delay of the set time interval, it is effective to remove fluctuations.
第１図は本発明の一実施例を示す概念図、第２図は音声
パケットのフレーム構成を示す構成図である。FIG. 1 is a conceptual diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing the frame structure of a voice packet.
Claims (1)
取りし音声信号があるレベルより低い場合は無音状態と
みなして符号化しない方式の音声パケット通信において
、音声パケットに送信間隔フィールドを付加し、パケッ
トの送信局では先頭パケットには前記送信間隔フィール
ドに０を設定し、二番目以後のパケットには直前に送出
したパケットから経過した時間を前記送信間隔フィール
ドに設定して受信局へ送信し、パケットの受信局では受
信したパケットを端末に送信する際にパケットの前記送
信フィールドに設定された時間分だけ直前に送信したパ
ケットから遅らせて送信し、各パケットの伝送時間の差
により生じる揺らぎをなくすことを特徴とする音声パケ
ット通信方式。In voice packet communication, in which a digitally encoded voice signal is exchanged in a packet, and if the voice signal is lower than a certain level, it is considered silent and is not encoded, a transmission interval field is added to the voice packet and the packet is transmitted. At the station, the first packet is set to 0 in the transmission interval field, and the second and subsequent packets are sent to the receiving station with the elapsed time from the previous packet sent in the transmission interval field, and the packets are received. When transmitting a received packet to a terminal, the station transmits it with a delay from the previously transmitted packet by the time set in the transmission field of the packet, thereby eliminating fluctuations caused by the difference in transmission time of each packet. A voice packet communication method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8877189A JPH01248726A (en) | 1988-03-29 | 1988-03-29 | Voice packet communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8877189A JPH01248726A (en) | 1988-03-29 | 1988-03-29 | Voice packet communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01248726A true JPH01248726A (en) | 1989-10-04 |
Family
ID=13626870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8877189A Pending JPH01248726A (en) | 1988-03-29 | 1988-03-29 | Voice packet communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01248726A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6741601B1 (en) | 1999-03-31 | 2004-05-25 | Nec Corporation | Delay fluctuation absorbing device and method |
| CN1663205B (en) | 2002-06-26 | 2010-06-09 | 摩托罗拉公司 | VOIP transmitter and receiver device and method thereof |
| JP2017005289A (en) * | 2015-06-04 | 2017-01-05 | 日本電信電話株式会社 | Delay fluctuation absorption method |
-
1988
- 1988-03-29 JP JP8877189A patent/JPH01248726A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6741601B1 (en) | 1999-03-31 | 2004-05-25 | Nec Corporation | Delay fluctuation absorbing device and method |
| CN1663205B (en) | 2002-06-26 | 2010-06-09 | 摩托罗拉公司 | VOIP transmitter and receiver device and method thereof |
| JP2017005289A (en) * | 2015-06-04 | 2017-01-05 | 日本電信電話株式会社 | Delay fluctuation absorption method |
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