Voice transmitting and receiving system

• US 20030179745A1
• Filed: 09/26/2002
• Published: 09/25/2003
• Est. Priority Date: 03/22/2002
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Infrontia Corporation (NEC Corporation)
• Inventors: Tsutsumi, Takayuki, Kobayashi, Yoshikazu
• Granted Patent: US 8,630,282 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: G10L 2025/783 based on threshold decision
• CPC Class Codes: H04L 65/1083 In-session procedures
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers

Abstract

Voice data from speech start till mute are transmitted as a section voice file to the opposite side voice data transmitting and receiving system, thus permitting voice data transmission free from voice interruption. By transmitting voice data from the speech start till the mute it is possible to eliminate packet losses in the data transmission channel and perform voice communication in the same voice quality as in the transmitting side. Besides, because of the use of HTTP communication port it is possible to obtain voice communication exceeding the rooter without any special setting.

Claims

1. A voice data transmitting and receiving system for transmitting and receiving voice data as packet data via a network, wherein:

on the transmitting side voice data from speech start detection till mute detection in communication voice are transmitted as one section voice file by packet switching, and on the receiving side the received voice data are voice outputted.

2. The voice data transmitting and receiving system according to claim 1, wherein the voice data are transmitted with an HTTP protocol.

3. The voice data transmitting and receiving system according to one of claims 1 and 2, wherein the voice data are transmitted by adding a given notification tone to the end of the voice file.

4. The voice data transmitting and receiving system according to one of claims 1 to 3, wherein on the transmitting side a predetermined header is added to the voice data, and on the receiving side only voice data, in which the predetermined header is detected, are subjected to voice processing.

5. The voice data transmitting and receiving system according to one of claims 1 to 4, wherein voice data received during voice generation are accumulated in the recorder, and the accumulated voice data are reproduced after the end of speech.

6. The voice data transmitting and receiving system according to claim 2, wherein on the transmitting side the HTTP file is transmitted by adding a header defined exclusively for voice, and on the receiving side HTTP file containing voice data and other data are separated from the header in the HTTP file.

7. The voice data transmitting and receiving system according to one of claims 1 to 6, wherein a packet with an added transmission right not for making the transmission and reception of a voice file at a time but for alternate voice transmission at the end of voice file, and on the receiving side transmission is waited until a packet containing the transmission right has been received.

8. The voice data transmitting and receiving system according to one of claims 1 to 7, wherein when the voice file exceeds a predetermined length, the voice file is divided to a predetermined size and transmitted by adding a header indicative of that the pertinent voice file is a voice file division, and on the receiving side the file divisions are combined based on the header to permit voice communication free from interruption.

9. The voice data transmitting and receiving system according to one of claims 1 to 8, wherein the network is a non-QoS guaranteed network.

10. The voice data transmitting and receiving system according to claim 9, wherein the non-QoS guaranteed network is an internet.

14. The voice data transmitting and receiving system according to one of claims 1 to 12, wherein high packet loss possibility packet data are judged as such and are re-transmitted together with a preceding packet.

11. A voice data transmitting and receiving system for voice data communication in IP via an IP network such as internet or LAN comprising:

a voice input/output unit;

a level detecting circuit for detecting speech start and mute of communication voice;

a recorder for accumulating the voice data from the speech head to mute detected by the level detecting circuit as a section voice file;

a packet switching part for packet switching voice data read out from the recorder; and

a LAN interface unit for transmitting and receiving of packet-switched voice packets to and from an IP network.

12. The voice data transmitting and receiving system according to claim 11, which further comprises an HTTP control circuit for controlling data communication with an HTTP protocol, and executes HTTP file generation from voice data accumulated in the recorder based on HTTP and extraction of voice data from the HTTP file and permits HTTP communication on TCP/IP connection, thus permitting voice communication exceeding fire wall of firm channel and IP network.

13. The voice data transmitting and receiving system according to claim 12, wherein a given notification tone is added to the end of the voice file to notify to the opposite side of communication that the present speech is transmitted in a communication system based on the HTTP.