CN101489088A

CN101489088A - Audio and video transmission system and method for video telephone

Info

Publication number: CN101489088A
Application number: CNA2008100564475A
Authority: CN
Inventors: 赵剑
Original assignee: TECHFAITH INTELLIGENT HANDSET TECHNOLOGY (BEIJING) Co Ltd
Current assignee: TECHFAITH INTELLIGENT HANDSET TECHNOLOGY (BEIJING) Co Ltd
Priority date: 2008-01-18
Filing date: 2008-01-18
Publication date: 2009-07-22

Abstract

The invention discloses an audio and video transmission system and a method of a video phone comprising: connecting an intelligent mobile phone supporting a video phone function with a computer through a USB interface, and outputting the video phone audio and video data to a computer end to process and play. Based on a standard video telephone scheme, a default audio and video output module is transferred to a computer end, so that an audio and video output device on a mobile terminal is in a turnoff or a standby state during the video communication process, thereby saving charge consumption for the mobile device. At the same time, because the mobile device and the computer are in a connection state, the mobile device can also get charge supplement through the USB interface, and greatly prolongs a continuous communication time of the video communication. The beneficial effects of invention are that the output device with more charge consumption during the video communication process is in the turnoff or standby state through changing an output current direction of the audio and video data, the corresponding output data is processed and displayed by the computer end, thereby effectively prolonging the communication time of the video telephone.

Description

A kind of Voice ﹠ Video transmission system and method for visual telephone

Technical field

The present invention relates to field of mobile communication, specifically refer to support the smart mobile phone of visual telephone function by the USB (abbreviation of English Universal Serial Bus, the Chinese implication is " USB ") interface is connected with computer, with visual telephone audio ﹠ video transfer of data to computer end processing and broadcast.

Background technology

Arrival along with the 3G (Third Generation) Moblie Age of Technology, realize that by wireless network video calling becomes a reality, make the user can see the other side's video image more intuitively in the enjoy high quality voice communications services, communication process is directly perceived more, hommization.

Based on third generation mobile network: CDMA2000 (english abbreviation Code Division MuitipleAccess 2000, the Chinese implication is " code division multiple access "), TD-SCDMA (english abbreviation TimeDivision-Synchronous Code Division Multipl eAccess, the Chinese implication is " TD SDMA access ") and W-CDMA (english abbreviation Wideband CDMA, the Chinese implication is " broadband demal multiplex (MUX) access ") video telephony comprehensive utilization video, audio frequency and other input-output equipment, the Voice ﹠ Video data that collect send after handling through protocol stack, receive and handle the packet that the other side sends over simultaneously.But because visual telephone has used more system resources, as video input-output equipment, audio frequency input-output equipment and modulator-demodulator etc., these equipment required big electric current of working simultaneously is a kind of very big burden for mobile device, already is that the battery capacity of one of mobile device performance bottleneck also is not enough to support long video calling.

USB is a kind of new interface technology that is applied in computer realm.USB has two standards, i.e. USB1.1 and USB 2.0.USB 1.1 is present comparatively general USB standards, and the transmission rate of its high speed mode is 12Mbps, and the transmission rate of low speed mode also reaches 1.5Mbps, considerably beyond the minimum requirements of transmission of audio and video data.At present most smart machines all provide USB interface, thereby have created condition for carrying out the Voice ﹠ Video data processing on the equipment externally.

Summary of the invention

At above-mentioned defective, the present invention is based on standard video telephone scheme, the Voice ﹠ Video output module of acquiescence is transferred to computer end, make that the output equipment of Voice ﹠ Video is on the portable terminal to close or holding state in video call process, thereby be mobile device saving electric quantity consumption.Simultaneously, because this moment, mobile device and computer were in connection status, mobile device can also obtain electric weight by USB interface and replenish, and prolongs the continuous air time of visual telephone greatly.

Visual telephone Voice ﹠ Video transmission system provided by the invention, this system mainly comprises with the lower part: support moving or fixed terminal 2 of visual telephone function, the base station 1 of access service is provided for terminal 2, support the portable terminal 3 of visual telephone function, for portable terminal 3 provides serving base station 4, the computer end that is connected with portable terminal 3 by USB.The visual telephone of terminal 2 and terminal 4 is connected by base station 3 and base station 4 to be realized.Two terminals receive the other side's audio-visual data separately, send local Voice ﹠ Video information simultaneously, and this process is realized by protocol stack.Terminal 4 sends to computer end with the Voice ﹠ Video data that receive by the USB connection, is received and is handled by computer end.And the Voice ﹠ Video data source of terminal 4 this locality still is the built-in Voice ﹠ Video input equipment of this portable terminal.

The Voice ﹠ Video transmission system and the method for visual telephone provided by the present invention, output stream by changing the Voice ﹠ Video data to, power consumption is bigger in video call process output equipment is in closes or holding state, corresponding dateout by computer end on behalf of handling and show, thereby effectively prolong air time of visual telephone.

Description of drawings

Fig. 1 visual telephone Voice ﹠ Video transmission system figure.

Fig. 2 internal system module interface and data flow

Embodiment

Below with reference to accompanying drawing embodiments of the invention are described.Fig. 1 is the visual telephone Voice ﹠ Video transmission system figure of the embodiment of the invention.This system mainly comprises with the lower part: support moving or fixed terminal 2 of visual telephone function, the base station 1 of access service is provided for terminal 2, support the portable terminal 3 of visual telephone function, for portable terminal 3 provides serving base station 4, the computer end that is connected with portable terminal 3 by USB.

Wherein base station 1 is connected by wired or wireless mode (1) with terminal 2, and base station 3 is connected by wireless mode (2) with

mobile device

4, and 4 of base station 3 and base stations are connected by network between the base station (3), and terminal 4 is connected by USB mode (4) with computer end.

The visual telephone of terminal 2 and terminal 4 be connected by the base station 3 and base station 4 realize.Two terminals receive the other side's audio-visual data separately, send local Voice ﹠ Video information simultaneously, and this process is realized by protocol stack.For present embodiment, portable terminal 4 is connected by the USB mode with computer end, and terminal 4 sends to computer end with the Voice ﹠ Video data that receive by the USB connection, is received and is handled by computer end.And the Voice ﹠ Video data source of terminal 4 this locality still is the built-in Voice ﹠ Video input equipment of this portable terminal, as microphone and camera.

Because the Voice ﹠ Video output procedure of terminal 4 has been transferred to computer end and realized that then the Voice ﹠ Video output equipment of terminal 4 this locality (as loud speaker and display screen) can be made as and cut out or holding state, thereby save electric quantity consumption.Simultaneously, portable terminal 4 also can obtain the external power source support by the USB connection, prolongs the air time greatly.

Fig. 2 is used for the internal module interface and the data flow of major part in the illustrative system.Computer end 1 mainly comprises video output module 11, audio frequency output module 12, data preprocessing module 13 and USB module 14.Portable terminal 2 comprises video input module 21, audio frequency input module 22, user interface 23, USB module 24,3G-324M protocol stack module 25, modulation module 26, wave point 27.Terminal 3 is for supporting moving or fixed terminal of visual telephone function.Terminal 2 and terminal 3 connect by air interface 4.

Data flow in the portable terminal 2 is divided into terminal 3 relatively and receives and the transmission both direction.

As transmit leg, the information of 3G-324M protocol stack 25 receiver, video input modules 21, audio frequency input module 22 and user interface 23 in the portable terminal 2, packing sends to terminal 3 via modulation module 26 and wave point 27 after handling.

As the recipient, the wave point 27 in the portable terminal 2 receives the wireless signal that sends in the wireless network, carries out demodulation operation by modulation module 26, and protocol stack 25 receives data by designated port and sends by the USB module subsequently.After USB module 14 in the computer end 1 receives data, data preprocessing module 13 is handled at once, with the Voice ﹠ Video data separating and send to video output module 11 and voice data module 12 respectively, 12 of module 11 and modules are done last processing (as decoding etc.) to the data of receiving separately and are shown or play.

The above-mentioned example of this method only is used for illustrative purposes, is not in order to limit the present invention.Those skilled in the art can make the various modifications that are equal within the scope of the invention, as adopt different codecs, different agreement or other wired connection mode etc., its operation principle is similar, wishes that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.

Claims

1, a kind of Voice ﹠ Video transmission system of visual telephone is characterized in that:

This system mainly comprises: support moving or fixed terminal 2 of visual telephone function, the base station 1 of access service is provided for terminal 2, support the portable terminal 3 of visual telephone function, for portable terminal 3 provides serving base station 4, the computer end that is connected with portable terminal 3 by USB.

2, a kind of method of Voice ﹠ Video transmission system of visual telephone is characterized in that: the visual telephone of terminal 2 and terminal 4 is connected by base station 3 and base station 4 to be realized.Two terminals receive the other side's audio-visual data separately, send local Voice ﹠ Video information simultaneously, and this process is realized by protocol stack.Terminal 4 sends to computer end with the Voice ﹠ Video data that receive by the USB connection, is received and is handled by computer end.And the Voice ﹠ Video data source of terminal 4 this locality still is the built-in Voice ﹠ Video input equipment of this portable terminal.