CN101110953A - Method and system for controlling multimedia communication quality in hand-hold device - Google Patents
Method and system for controlling multimedia communication quality in hand-hold device Download PDFInfo
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Abstract
The present invention relates to a method and a system for controlling the multimedia communication quality in a handheld device, and the handheld device comprises a wireless network to receive or transmit the multimedia information data. Firstly, the multimedia information data is transmitted by a preset video decode parameter through the wireless network. Secondly, the quality of the wireless network is detected, if the quality of the wireless network is poor, the video decode parameter transmitted is changed. Finally, the quality of the received multimedia information data is detected, if the quality of the received multimedia information data is poor, the video decode parameter transmitted is changed.
Description
Technical field
(Quality of Service, control method QoS) refer to a kind of system and method for controlling multimedia communication quality in handheld apparatus especially to the present invention relates to a kind of Communications service quality.
Background technology
Wireless telecommunication system gradually by analogy wireless telecommunication system (for example: AMPS, TACS) develop into the digital radio communication system (for example: GSM, CDMA, and TDMA).The wireless telecommunication system in preceding two generations is replaced by third generation digital radio communication system now just gradually.Wherein, first generation wireless telecommunication system mainly focuses on provides voice service, and second generation wireless telecommunication system is except providing speech communication, and also focusing on provides data communication, third generation wireless telecommunication system then focuses on provides abundant content, for example multimedia and audio and video information.In the third generation wireless telecommunication system, the WCDMA wireless telecommunication system is owing to wireless link ability at a high speed, so be regarded as the platform of many new application, for example video conference (video conference).
Video conference is considered to be the key that drives third generation wireless communication service.At video conference application, in the U.S. in early days openly in communique US20050265383 number " Method and systemfor communicating video data in a packet-switched network; relatednetwork and computer program product therefor ", tie up in the packet-switched networking of a radio channel, transmit image data.Yet,,, promptly can't guarantee the image quality that it transmits so the assurance of service quality (QoS) can't be provided because it is used in the packet-switched networking.
Based on Circuit-switched 3G-324m agreement is present unique feasible program that the Wi-Fi video conference can be provided.Yet existing video encoding method (for example H.263) uses fixing output tape sorting bit rate (output stream bitrate) and coding parameter, and is not suitable for having noise interference and the conditional radio channel of frequency range.The assurance of service quality (QoS) mechanism at image is not arranged in the 3G-324m agreement simultaneously.Therefore, existing Wi-Fi video conferencing technology still has many defectives and gives improved necessity.
Summary of the invention
The objective of the invention is is providing a kind of system and method for controlling multimedia communication quality in handheld apparatus, thereby can solve the bad problem of image quality in the existing Wi-Fi video conference.
Another object of the present invention is that a kind of system and method for controlling multimedia communication quality in handheld apparatus is being provided, thereby can solve existing video encoding method because of using fixing output tape sorting bit rate and coding parameter, cause and be not suitable for having that noise disturbs and the problem of the conditional radio channel of frequency range.
Another purpose of the present invention is that a kind of system and method for controlling multimedia communication quality in handheld apparatus is being provided, thereby the assurance of service quality (QoS) mechanism of image can be provided in the Wi-Fi video conference.
According to characteristic of the present invention, the present invention proposes a kind of system that controls multimedia communication quality in handheld apparatus, and it comprises a sending and receiving module, a net analysis and image control module, a code device, reaches a video delivery module.This sending and receiving module is coupled to one and accesses interface (air-interface) in the air, accesses interface in the air data are sent to this, or accesses interface reception data in the air by this; This net analysis and image control module are connected to this sending and receiving module, produce an image coding control signal according to a service quality information, this image coding control signal has one first state and one second state, this first state be indication this to access the interface communication quality in the air good, this second state be indication this access the interface communication bad in the air; This code device is connected to this net analysis and image control module and receives a uncoded video data stream (video stream), adjust its video coding parameter according to this image coding control signal state, this uncoded video data stream is carried out compressed encoding, to produce a transmitting data stream (transport stream); This video delivery module is connected to this code device and this sending and receiving module, thereby this transmitting data stream is encapsulated as the form that this sending and receiving module transmits, thereby is transmitted by this sending and receiving module.
According to another characteristic of the present invention, the present invention proposes the method for the multimedia communication quality of a kind of use in handheld apparatus, this handheld apparatus is to receive or to transmit multi-medium data via a Wi-Fi, this method comprises: (A) with default image coding parameter, this uncoded video data stream is carried out compressed encoding, producing a transmitting data stream (transportstream), and transmit multi-medium data via this Wi-Fi; (B) detect this Wi-Fi quality, with when this Wi-Fi quality is bad, change the image coding parameter that transmits, the image frame number (Video frame per second) that for example dwindles image analytic degree (Video Resolution) or reduce each second, this uncoded video data stream is carried out compressed encoding, in the hope of reaching the size that reduces imaging data stream; (C) quality of detecting institute receiving multimedia data, with when the quality of institute's receiving multimedia data is bad, change the image coding parameter that transmits, the image frame number (Video frame per second) that for example dwindles image analytic degree (Video Resolution) or reduce each second, this uncoded video data stream is carried out compressed encoding, to reach the purpose of the size that reduces imaging data stream.
Description of drawings
Fig. 1 is a calcspar of controlling the system of multimedia communication quality in handheld apparatus of the present invention.
Fig. 2 is the flow chart of the method for the multimedia communication quality of a kind of use of the present invention in handheld apparatus.
The main element symbol description
Sending and receiving module 110 video data streams 161
Net analysis and image control module 120
Dynamic resource management device 170 image receiver modules 180
Image quality analysis module 190 accesses interface 200 in the air
The first control signal C1, the second control signal C2
Image coding control signal VEC imaging data stream IS
Video data stream VS video data stream NVS
Transmission stream TS video data stream PVS
Embodiment
When carrying out video conference in Wi-Fi, (Quality of Service QoS) is playing the part of considerable role to the service quality of image.Fig. 1 is a calcspar of controlling the system of multimedia communication quality in handheld apparatus of the present invention.It comprises a sending and receiving module 110, a net analysis and image control module 120, a code device 130, a video delivery module 140, an image capture unit 150, a video code conversion device (Video Transcoder) 160, one dynamic resource management device 170, an image receiver module 180, reaches an image quality analysis module 190.
This sending and receiving module 110 is coupled to one and accesses interface (air-interface) 200 in the air, access interface 200 in the air data are sent to this, or access interface 200 in the air by this and receive data, this sending and receiving module 110 also provides this to access interface 200 in the air to have service quality and guarantee (Qualityof Service, information QoS).This accesses interface 200 in the air is via a Wi-Fi sending and receiving Wi-Fi package.
These sending and receiving module 110 preferable 3G-324m sending and receiving modules that can be.This sending and receiving module 110 is to carry out time division multiplexing circuit switching agreement (Time Division MultiplexingCircuit-switched).
This net analysis and image control module 120 are connected to this sending and receiving module 110, produce an image coding control signal VEC according to a service quality information, this image coding control signal VEC has one first state and one second state, this first state be indication this to access interface 200 communication qualities in the air good, this second state be indication this to access interface 200 communication qualities in the air not good.
Net analysis and image control module 120 signal to noise ratio (the Signal to Noise Ratio that can be transmitted according to this sending and receiving module 110 in addition, SNR), bit error rate (Bit Error Rate, BER), wireless signal strength index (Radio Signal Strengh Indicator, RSSI) and the wherein arbitrary numerical value of packet loss (Packet Loss Rate) judge the networking situation, be used as the reference of this service quality information.For example module 120 can use the packet loss of this Wi-Fi whether to surpass one first predetermined value, to judge this Wi-Fi quality, when this packet loss surpasses this first predetermined value, judges that then this Wi-Fi quality is bad.When this packet loss does not surpass this first predetermined value, judge that then this Wi-Fi quality is good.Perhaps net analysis and image control module 120 can be with reference to signal to noise ratios, when signal to noise ratio during less than one second system predetermined value, represent that then the situation of wireless signal is in bad situation.Perhaps net analysis and image control module 120 can when the bit error rate is united predetermined value greater than a tertiary system, represent that then the Data Receiving situation of wireless signal is in bad situation with reference to the bit error rate.Perhaps module 120 can when the wireless signal strength index is united predetermined value less than a Quaternary system, represent that then the situation of wireless signal is in bad situation with reference to the wireless signal strength index.
When net analysis and image control module 120 judgement systems are under the not good situation of communication quality, system can enter second state according to the judged result of net analysis and image control module 120, and the image coding parameter of change transmission, the image frame number (Video frame per second) that for example dwindles image analytic degree (VideoResolution) or reduce each second, allow module 130 this uncoded video data stream be carried out compressed encoding, in the hope of reaching the size that reduces imaging data stream according to the image coding parameter of revising.
When net analysis and image control module 120 judgement systems are under the good situation of communication quality, system can enter first state according to the judged result of net analysis and image control module 120, and with default image coding parameter, allow module 130 this uncoded video data stream be carried out compressed encoding, to produce a transmitting data stream (transport stream) according to this default image coding parameter.
This image capture unit 150 is coupled to this code device 130, and this image capture unit 150 is in order to pick-up image and produce a uncoded video data stream VS (video stream).This image capture unit 150 is preferably charge coupled device (charge couple device) Image sensor apparatus.In other embodiment, this image capture unit 150 also can be complementary matal-oxide semiconductor (Complementary Metal-Oxide Semiconductor, CMOS) Image sensor apparatus.
This code device 130 is connected to this net analysis and image control module 120 and this image capture unit 150, this code device 130 receives this uncoded video data stream NVS, and adjust its video coding parameter according to the state of this image coding control signal VEC, to reduce image frame per second (frame rate), the image analytic degree (resolution) of coding, thereby this uncoded video data stream NVS is carried out compressed encoding, to produce a transmission stream TS (transportstream).
This code device 130 is preferably carries out H.263 compressed encoding.In other embodiment, but this code device 130 also MPEG4 or compressed encoding H.264.
This video delivery module 140 is connected to this code device 130 and this sending and receiving module 110, thereby this transmission stream TS is encapsulated as the form that this sending and receiving module 110 transmits, thereby is transmitted by this sending and receiving module 110.
This video code conversion device (Video Transcoder) 160 is connected to this net analysis and image control module 120, state according to this image coding control signal VEC is adjusted its video coding parameter, is the video data stream PVS of different resolutions and image frame per second (Frame Rate) with video data stream (pre-encoded video stream) 161 transcodings with a prior coding.
When this image coding control signal VEC is first state, be expression this to access interface 200 communication qualities in the air good, then will be somebody's turn to do video data stream 161 transcodings of encoding in advance be the video data stream PVS of a high-res and high image frame per second (frame rate) to this video code conversion device 160.When this image coding control signal VEC is second state, be expression this to access interface 200 communication qualities in the air not good, 160 in this video code conversion device will be somebody's turn to do in advance that video data stream 161 transcodings of coding are a low-res and hang down the video data stream PVS of image frame per second (frame rate).
Dynamic resource management device 170 is coupled to this net analysis and image control module 120, and the resource of these dynamic resource management device 170 these handheld apparatus of detecting produces one first control signal C1.The resource of this handheld apparatus comprises: the battery residual quantity of the load of the processor of this handheld apparatus, this handheld apparatus, and the memory use amount of this handheld apparatus.
This first control signal C1 has one first resource status and one second resource status.This first resource status is this handheld apparatus resource abundance of indication, and this second resource status is this handheld apparatus inadequate resource of indication.For example, when the battery residual quantity that the memory use amount that is lower than a load preset value, this handheld apparatus when the load of the processor of this handheld apparatus is lower than a memory use amount preset value or this handheld apparatus is higher than a residual quantity preset value, this first control signal C1 is this first resource status, in order to indicate this handheld apparatus resource abundance.
This net analysis and image control module 120 are according to the state of this first control signal C1, adjusting this image coding control signal VEC, thereby allow this code device 130 and this video code conversion device 160 adjust its video coding parameter according to the state of this image coding control signal VEC.
This image receiver module 180 is coupled to this sending and receiving module 110, and this image receiver module 180 accesses the imaging data stream IS that interface 200 receives in order to receive this sending and receiving module 110 in the air by this.This image quality analysis module 190 is coupled to this image receiver module 180 and this net analysis and image control module 120, with according to this quality that receives imaging data stream, produces one second control signal C2.The quality of this reception imaging data stream IS comprises: frame is delayed changing (frame-delayvariation), bit error rate (bit error rate), is reached frame loss rate (frame loss rate).
This second control signal C2 has one first image quality state and one second image quality state.This first image quality state is that the quality of this reception imaging data stream of indication IS is good, and this second image quality state is that the quality of this reception imaging data stream of indication IS is bad.For example, when this frame delays change surpassing one when delaying changing preset value, this bit error rate and surpassing a preset value or this frame loss rate and surpass a loss rate preset value, this second control signal C2 is this second image quality state, and it is bad in order to the quality of indicating this reception imaging data stream IS.
This net analysis and image control module 120 are according to the state of this second control signal C2, adjusting this image coding control signal VEC, thereby allow these code device 130 these video code conversion devices 160 adjust its video coding parameter according to the state of this image coding control signal VEC.
In the present invention, system allows 130 pairs of these uncoded video data streams of this code device carry out compressed encoding except adjusting video coding parameter via the judged result of this net analysis and image control module 120; System can also adopt this video code conversion device 160, judged result according to this net analysis and image control module 120, press coded video data later to carry out video code conversion this code device 130 again, convert higher or lower video data rate to, to meet the communication quality that this net analysis and image control module 120 are analyzed.
Fig. 2 is the flow chart of the method for the multimedia communication quality of a kind of use of the present invention in handheld apparatus.This handheld apparatus is to receive or to transmit multi-medium data via a Wi-Fi.At first in step S210, transmit multi-medium data via this Wi-Fi with default image coding parameter.This Wi-Fi quality of detecting in step S220, with when this Wi-Fi quality is bad, execution in step S250 is to change the image coding parameter that transmits, to reduce image frame per second, the image analytic degree of coding.In step S220, judge when this Wi-Fi quality is good execution in step S230.
Step S220 can have signal to noise ratio, bit error rate, wireless signal strength index and packet loss by referential data when judging.System can be with reference to any numerical value wherein, or be used as the networking with reference to any two above numerical value wherein and receive the basis for estimation that transmits quality; For example use the packet loss of this Wi-Fi whether to surpass one first predetermined value,,, judge that then this Wi-Fi quality is bad when this packet loss surpasses this first predetermined value to judge this Wi-Fi quality.When this packet loss does not surpass this first predetermined value, judge that then this Wi-Fi quality is good.
The image coding parameter of step S250 is image frame per second or image analytic degree.
In step S230, the quality of detecting institute receiving multimedia data with when the quality of institute's receiving multimedia data is bad, changes the image coding parameter (step S250) that transmits.The quality of receiving multimedia data comprises among the step S230: frame is delayed variation, bit error rate, is reached the frame loss rate.
In step S230, it is good to receive multimedia quality as this, and whether the resource of judging this handheld apparatus again enough (step S240), with when the inadequate resource of this handheld apparatus, changes the image coding parameter (step S250) of transmission.In step S240, if the resource of this handheld apparatus is enough, then among the resumes step S210.
In step S240, the resource of this handheld apparatus comprises: the battery residual quantity of the load of the processor of this handheld apparatus, this handheld apparatus, and the memory use amount of this handheld apparatus.
From the above, the system and method for controlling multimedia communication quality in handheld apparatus of the present invention can not only solve the bad problem of image quality in the existing Wi-Fi video conference.Can solve existing video encoding method again because of using fixing output tape sorting bit rate and coding parameter, cause and be not suitable for having that news are disturbed and the problem of the conditional radio channel of frequency range.Simultaneously, the mechanism that the system and method for control multimedia communication quality can provide the service quality (QoS) of image to guarantee in the Wi-Fi video conference in handheld apparatus of the present invention.
The foregoing description is only given an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (22)
1. the system of a control multimedia communication quality in handheld apparatus, this handheld apparatus be via a Wi-Fi to receive or to transmit multi-medium data, this system comprises:
One sending and receiving module, it is coupled to one and accesses interface in the air, accesses interface in the air data are sent to this, or accesses interface in the air by this and receive this data, and this accesses interface in the air is the Wi-Fi package that comprises these data via Wi-Fi sending and receiving;
One net analysis and image control module, be connected to this sending and receiving module, produce an image coding control signal according to a service quality information, this image coding control signal has one first state and one second state, this first state be indication this to access the interface communication quality in the air good, this second state be indication this access the interface communication bad in the air;
One code device, be connected to this net analysis and image control module and receive a uncoded video data stream, adjust its video coding parameter according to this image coding control signal, this code device carries out compressed encoding to this uncoded video data stream, to produce a transmitting data stream; And
One video delivery module is connected to this code device and this sending and receiving module, thereby this transmitting data stream is encapsulated as the form that this sending and receiving module transmits, thereby is transmitted by this sending and receiving module.
2. multimedia communication quality according to claim 1 system, it also comprises:
One image capture unit, it is coupled to this code device, and this image capture unit is in order to pick-up image and produce this uncoded video data stream.
3. multimedia communication quality according to claim 2 system, it also comprises:
One video code conversion device, be connected to this net analysis and image control module, adjusting this video coding parameter according to this image coding control signal, is the video data stream with different resolutions and image transfer rate with the video data stream transcoding with a prior coding;
Wherein, when this image coding control signal is first state, this video code conversion device then will be somebody's turn to do in advance, and the video data stream transcoding of coding is the video data stream of a high-res and high image transfer rate, when this image coding control signal is second state, this video code conversion device then will be somebody's turn to do the video data stream that the video data stream transcoding of encoding in advance is a low-res and low image transfer rate.
4. multimedia communication quality according to claim 3 system, it also comprises:
One dynamic resource management device, it is coupled to this net analysis and image control module, and this dynamic resource management device is detected the resource of this handheld apparatus, produces one first control signal;
Wherein, this net analysis and image control module are according to this first control signal, to adjust this image coding control signal.
5. multimedia communication quality according to claim 4 system, wherein, the resource of this handheld apparatus comprises battery residual quantity, and the memory use amount of this handheld apparatus of load, this handheld apparatus of the processor of this handheld apparatus.
6. multimedia communication quality according to claim 3 system, it also comprises:
One image receiver module, it is coupled to this sending and receiving module, and this image receiver module accesses the imaging data stream that interface receives in order to receive this sending and receiving module in the air by this;
One image quality analysis module, it is coupled to this image receiver module and this net analysis and image control module, with according to this quality that receives imaging data stream, produces one second control signal;
Wherein, this net analysis and image control module are according to this second control signal, to adjust this image coding control signal.
7. multimedia communication quality according to claim 6 system, wherein, the quality of this reception imaging data stream comprises frame and delays variation, bit error rate, and frame loss rate.
8. multimedia communication quality according to claim 1 system, wherein, this sending and receiving module is a 3G-324m sending and receiving module.
9. multimedia communication quality according to claim 1 system, wherein, net analysis and image control module are to use the packet loss of this Wi-Fi whether to surpass one first predetermined value, to judge this Wi-Fi quality, when this packet loss surpasses this first predetermined value, judge that then this Wi-Fi quality is bad, and produce this service quality information according to this.
10. multimedia communication quality according to claim 1 system, wherein, whether net analysis and image control module are to use the signal to noise ratio of this Wi-Fi less than one second predetermined value, to judge this Wi-Fi quality, when this signal to noise ratio less than this second predetermined value, judge that then this Wi-Fi quality is bad, and produce this service quality information according to this.
11. multimedia communication quality according to claim 1 system, wherein, whether net analysis and image control module use the bit error rate of this Wi-Fi greater than one the 3rd predetermined value, to judge this Wi-Fi quality, when this bit error rate greater than the 3rd predetermined value, judge that then this Wi-Fi quality is bad, and produce this service quality information according to this.
12. multimedia communication quality according to claim 1 system, wherein, whether net analysis and image control module use the wireless signal strength index of this Wi-Fi less than one the 4th predetermined value, to judge this Wi-Fi quality, when this wireless signal strength index less than the 4th predetermined value, judge that then this Wi-Fi quality is bad, and produce this service quality information according to this.
13. the method for the multimedia communication quality of a use in handheld apparatus, this handheld apparatus be via a Wi-Fi to receive or to transmit multi-medium data, this method comprises:
(A) transmit multi-medium data with default image coding parameter via this Wi-Fi;
(B) detect this Wi-Fi quality,, change this image coding parameter that transmits with when this Wi-Fi quality is bad; And
(C) quality of detecting institute receiving multimedia data with when the quality of institute's receiving multimedia data is bad, changes the image coding parameter that transmits.
14. the method for multimedia communication quality according to claim 13, wherein, in step (C), if the multimedia quality that receives good, whether the resource of judging this handheld apparatus again is enough, when the inadequate resource of this handheld apparatus, changes this image coding parameter that transmits.
15. the method for multimedia communication quality according to claim 13, wherein, step (B) is to use the packet loss of this Wi-Fi whether to surpass one first predetermined value, to judge this Wi-Fi quality, when this packet loss surpasses this first predetermined value, judge that then this Wi-Fi quality is bad.
16. the method for multimedia communication quality according to claim 13, wherein, whether step (B) is to use the signal to noise ratio of this Wi-Fi less than one second predetermined value, to judge this Wi-Fi quality, when this signal to noise ratio less than this second predetermined value, judge that then this Wi-Fi quality is bad.
17. the method for multimedia communication quality according to claim 13, wherein, whether step (B) is to use the bit error rate of this Wi-Fi greater than one the 3rd predetermined value, to judge this Wi-Fi quality, when this bit error rate greater than the 3rd predetermined value, judge that then this Wi-Fi quality is bad.
18. the method for multimedia communication quality according to claim 13, wherein, whether step (B) is to use the wireless signal strength index of this Wi-Fi less than one the 4th predetermined value, to judge this Wi-Fi quality, when this wireless signal strength index less than the 4th predetermined value, judge that then this Wi-Fi quality is bad.
19. the method for multimedia communication quality according to claim 13, wherein, the image coding parameter of step (B) is the image frame per second.
20. the method for multimedia communication quality according to claim 13, wherein, the image coding parameter of step (B) is an image analytic degree.
21. the method for multimedia communication quality according to claim 13, wherein, the quality of receiving multimedia data comprises in the step (C): frame is delayed variation, bit error rate and frame loss rate.
22. the method for multimedia communication quality according to claim 14, wherein, the resource of this handheld apparatus comprises: the battery residual quantity of the load of the processor of this handheld apparatus, this handheld apparatus and the memory use amount of this handheld apparatus.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103096059A (en) * | 2011-11-04 | 2013-05-08 | 宏碁股份有限公司 | Wireless video transmission system and method |
| CN103110428A (en) * | 2011-11-16 | 2013-05-22 | 深圳迈瑞生物医疗电子股份有限公司 | Ultrasonic imaging method and system |
| CN104185084A (en) * | 2013-05-24 | 2014-12-03 | 辉达公司 | Graphics server and method for managing streaming parameters |
| TWI502965B (en) * | 2011-10-27 | 2015-10-01 | Acer Inc | Wireless video transmission system and method |
| CN103096059B (en) * | 2011-11-04 | 2016-12-14 | 宏碁股份有限公司 | Wireless audio transmission system and method |
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2006
- 2006-07-20 CN CNA2006101015885A patent/CN101110953A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI502965B (en) * | 2011-10-27 | 2015-10-01 | Acer Inc | Wireless video transmission system and method |
| CN103096059A (en) * | 2011-11-04 | 2013-05-08 | 宏碁股份有限公司 | Wireless video transmission system and method |
| CN103096059B (en) * | 2011-11-04 | 2016-12-14 | 宏碁股份有限公司 | Wireless audio transmission system and method |
| CN103110428A (en) * | 2011-11-16 | 2013-05-22 | 深圳迈瑞生物医疗电子股份有限公司 | Ultrasonic imaging method and system |
| CN104185084A (en) * | 2013-05-24 | 2014-12-03 | 辉达公司 | Graphics server and method for managing streaming parameters |
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