CN102740415B - One is applied to wireless video system, control method and intelligent gateway - Google Patents
One is applied to wireless video system, control method and intelligent gateway Download PDFInfo
- Publication number
- CN102740415B CN102740415B CN201110084894.3A CN201110084894A CN102740415B CN 102740415 B CN102740415 B CN 102740415B CN 201110084894 A CN201110084894 A CN 201110084894A CN 102740415 B CN102740415 B CN 102740415B
- Authority
- CN
- China
- Prior art keywords
- network
- video data
- scdma
- video
- module
- 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.)
- Active
Links
Classifications
-
- Y02B60/50—
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
A control method that is applied to wireless video system, the method comprises: gateway connects video front-end equipment; This gateway preferentially detects the signal power of WiFi network, if the value of described power is greater than or is more than or equal to the first threshold value, and the video data of selecting described WiFi network transmitting to receive from video front-end equipment; Otherwise, detect TD-SCDMA network parameter; This gateway detects TD-SCDMA network parameter, if meet the requirement of TD-SCDMA network launch mass, selects TD-SCDMA network to send described video data; Otherwise, the signal power of detection WiFi network. Also disclose a kind of intelligent gateway and a kind of wireless video system that is applied to wireless video system herein, and then ensured the quality of wireless video.
Description
Technical field
The present invention relates to wireless communication technology field, more specifically, relate to one be applied to wireless video system,Control method and intelligent gateway.
Background technology
In the last few years, along with the day by day maturation of wireless access wide band technology and 3G (Third Generation) Moblie technology, nothingThe message transmission rate of line communication has had great lifting. Meanwhile, video compression technology has also had rapidlyDevelopment, H.264 standard also has high-quality smooth image in the situation that having high compression ratio. BroadbandThe application that develops into wireless video of wireless access technology and two technology of 3G (Third Generation) Moblie technology has been establishedGood basis, due to economy and the convenience of wireless video, the scene of its use is more and more extensive, timeAnd the field such as traffic block port monitoring, mobile law enforcement, community, household safety-protection.
Common wireless video comprises wireless video monitoring etc., and the system architecture of wireless video monitoring is as Fig. 1 instituteShow, wherein wireless communication module is present in two positions, and the one, in integral type camera, i.e. this cameraHave video signal collective, compressed encoding and signal transmission triple functions concurrently; The 2nd, at the digital video clothes of front endIn business device, this digital video frequency server has the function of compressed encoding, signal transmission. At above-mentioned two schemesIn, wireless communication module all integrates with the headend equipment of video, and wherein headend equipment comprises front endEncoder. Head end encoder is only sent to video by TD-SCDMA base station by the video data after codingMonitor supervision platform or be only sent to video monitoring platform by the access point of WIFI network.
Visible, existence comprises the feelings of the various communications protocols of TD-SCDMA network and WiFi network at the same timeUnder condition, only pass through wherein a kind of wireless network and send video to video monitoring platform. When this wireless network signal, video cannot be ensured normally to transmit, the stronger nothing of other signal in various communications protocols can not be switched toIn spider lines, and then cannot ensure the quality of wireless video.
Summary of the invention
The embodiment of the present invention proposes a kind of control method that is applied to wireless video system, to ensure wireless lookingQuality frequently.
The embodiment of the present invention also proposes a kind of intelligent gateway that is applied to wireless video system, wireless to ensureThe quality of video.
The embodiment of the present invention also proposes a kind of wireless video system, to ensure the quality of wireless video.
The technical scheme of the embodiment of the present invention is as follows:
A control method that is applied to wireless video system, the method comprises:
Gateway connects video front-end equipment;
Described gateway preferentially detects the signal power of WiFi network, if the value of described power is greater than or is more than or equal toThe first threshold value, the video data of selecting described WiFi network transmitting to receive from video front-end equipment;
If the value of described power is less than the first threshold value, described gateway detects TD-SCDMA network parameter,If meet the requirement of TD-SCDMA network launch mass, select TD-SCDMA network to send from videoThe video data that end equipment receives, otherwise, the signal power of detection WiFi network.
Wireless video system is in indoor environment, and described the first threshold value equals-70 dBm dbm;Wireless video system in outdoor environment, described equal-85dbm of the first threshold value.
Described detection TD-SCDMA network parameter, if meet the requirement of TD-SCDMA network launch mass,Selecting TD-SCDMA network to send video data comprises:
If judge in TD-SCDMA and have HSUPA pattern, launch initialize data stream, detectThe Block Error Rate of TD-SCDMA system, if described Block Error Rate is less than or equal to the second threshold value, selectsTD-SCDMA network transmitting video data; If described Block Error Rate is greater than the second threshold value, according to non-HSUPA pattern transmitting initialize data stream;
If judge in TD-SCDMA and do not have HSUPA pattern, pre-according to non-HSUPA pattern transmittingPut data flow, detect the Block Error Rate of TD-SCDMA system, described Block Error Rate is less than or equal to the 3rd threshold value,Utilize TD-SCDMA network transmitting video data;
Described the second threshold value equals 0.05, and described the 3rd threshold value equals 0.1.
Described WiFi network comprises any one WiFi network in 802.11n, 802.11g and 802.11b.
Described method further comprises, in the time selecting network, dynamically adjusts according to selected network transmission speedWhole launched video data format.
The described video data format that dynamic adjustment is launched according to network transmission speed comprises: work as Internet TransmissionSpeed is greater than 350 kilobit rate kbps, selects D1 form; When transfer rate is comprising 350kbps and 100Between kbps and 350kbps and 100kbps, choice criteria picture format CIF; When transfer rate littleIn 100kbps, select working standard picture format QCIF.
Described method further comprises, selecting before network, and segmentation buffer memory video data.
Selected network transfer speeds is more than or equal to 60kbps, and described segmentation buffer memory video data comprises table tennisBuffer memory video data;
Selected network transfer speeds is less than 60kbps, and described segmentation buffer memory video data comprises that utilization allMemory cell buffer memory video data.
If the form of video data is D1 or CIF, the whole memory cell buffer memory of described utilization video data comprises:The D1 of video data is converted to CIF or the CIF of video data is converted to QCIF, utilize all storagesUnit caches video data.
If the form of video data is QCIF, the whole memory cell buffer memory of described utilization video data comprises: pressSequencing according to the Video Data Storage time abandons video data, utilizes whole memory cell buffer memorys remainingVideo data.
Be applied to an intelligent gateway for wireless video system, be positioned at video front-end equipment and TD-SCDMABetween network base station and WiFi Network Access Point, described intelligent gateway comprises,
CPU module, sends instruction to LAN interface for the selection result sending according to network detection moduleModule;
WiFi communication module, for receiving WiFi network signal, and the WiFi network parameter receiving is logicalCross CPU module and be sent to network detection module, receive looking of LAN interface module transmission by CPU moduleAudio data, launches described video data;
TD-SCDMA communication module, for receiving TD-SCDMA network signal, and will receiveTD-SCDMA network parameter is sent to network detection module by CPU module, receives by CPU moduleThe video data that LAN interface module sends, launches described video data;
Network detection module, for the WiFi network signal power that receives according to WiFi communication module andThe network parameter of the TD-SCDMA that TD-SCDMA communication module obtains is selected network, by selection resultBe sent to CPU module;
LAN interface module, for from video front-end equipment receiving video data, sends out according to CPU moduleIt is logical to WiFi communication module or TD-SCDMA that the instruction of sending sends described video data by CPU moduleLetter module.
Described TD-SCDMA communication module is further used for launching initialize data stream, receives TD-SCDMAOr/and the Block Error Rate of TD-SCDMAHSUPA pattern, and described Block Error Rate is sent by CPU moduleTo network detection module;
Described network detection module is further used for selecting network according to the Block Error Rate of TD-SCDMA.
Described WiFi communication module comprises,
The first communication unit, for receiving the WiFi network signal of supporting 802.11n agreement, by supportingThe WiFi network of 802.11n agreement is launched described video data;
Second communication unit, for receiving the WiFi network signal of supporting 802.11g agreement, by supportingThe WiFi network of 802.11g agreement is launched described video data;
Third communication unit, for receiving the WiFi network signal of supporting 802.11b agreement, by supportingThe WiFi network of 802.11b agreement is launched described video data.
Described CPU module is further used for according to network parameter forward end encoder feedback signal.
Described intelligent gateway further comprises stores processor module, for passing through CPU module segmentation buffer memory LANThe video data that interface module receives, and described video data is sent to WiFi mould by CPU modulePiece or TD-SCDMA module.
WiFi network transfer speeds or TD-SCDMA network transfer speeds are more than or equal to 60 kilobit ratesKbps, described stores processor module is further used for receiving described video data by CPU module, and table tennis is slowDeposit described video data;
WiFi network transfer speeds or TD-SCDMA network transfer speeds are less than 60kbps, described depositoryReason module is further used for receiving described video data by CPU module, utilizes whole memory space buffer memory instituteState video data.
WiFi network transfer speeds or TD-SCDMA network transfer speeds are less than 60kbps,
Still have the video data that cannot transmit, and the form of video data is D1 or CIF, described storage mouldPiece is further used for, and the D1 of video data is converted to CIF or the CIF of video data is converted to QCIF,Utilize video data described in whole memory space buffer memorys;
Still have the video data that cannot transmit, and the form of video data is QCIF, described memory module is enteredOne step is used for, and abandons video data according to the priority of Video Data Storage time, utilizes whole memory spaces slowDeposit remaining video data.
A kind of wireless video system, comprises video front-end equipment, intelligent gateway, TD-SCDMA network base stationWith WiFi Network Access Point, video front-end equipment sends video data to intelligent gateway, and intelligent gateway is selectedTD-SCDMA network base station or WiFi Network Access Point send video data;
Described intelligent gateway comprises,
CPU module, sends instruction to LAN interface for the selection result sending according to network detection moduleModule;
WiFi communication module, for receiving WiFi network signal, and the WiFi network condition receiving is logicalCross CPU module and be sent to network detection module, receive looking of LAN interface module transmission by CPU moduleAudio data, launches described video data;
TD-SCDMA communication module, for receiving TD-SCDMA network signal, and will receiveTD-SCDMA network parameter is sent to network detection module by CPU module, receives by CPU moduleThe video data that LAN interface module sends, launches described video data;
Network detection module, for the WiFi network signal power that receives according to WiFi communication module andThe network parameter of the TD-SCDMA that TD-SCDMA communication module obtains is selected network, by selection resultBe sent to CPU module;
LAN interface module, for by netting twine from video front-end equipment receiving video data, according to CPUThe instruction that module sends send described video data to WiFi communication module by CPU module orTD-SCDMA communication module.
From technique scheme, can find out, in embodiments of the present invention, due to the biography of WiFi networkDefeated speed, far above the transmission speed of TD-SCDMA network, therefore preferentially connects WiFi network, ifThe signal power of WiFi network is less than the first threshold value, judges that whether TD-SCDMA network parameter is fullThe requirement of foot launch mass. If TD-SCDMA network parameter meets launch mass requirement, utilize TD-SCDMA Internet Transmission video data, otherwise again connect WiFi network. Along with WiFi network andThe variation of the index of correlation of TD-SCDMA network, situation about covering according to wireless network automatically select andHandover network, when the network quality of two-forty is bad or there is no to cover the net that is automatically connected to low rateNetwork. Dynamic Selection preferably network sends video data. Thereby ensure the quality of wireless video.
Brief description of the drawings
Fig. 1 is wireless video monitoring system framework map in prior art;
Fig. 2 is the control method schematic flow sheet that the embodiment of the present invention is applied to wireless video system;
Fig. 3 is the intelligent gateway structural representation that the embodiment of the present invention is applied to wireless video system;
Fig. 4 is the form schematic diagram of adjusting video data in the embodiment of the present invention;
Fig. 5 is the wireless video system framework map of application intelligent gateway.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention express clearlyer, below in conjunction with attachedThe present invention is further described in more detail for figure and specific embodiment.
In embodiments of the present invention, first judge the signal power of WiFi network, if WiFi network signalPower a little less than continue judge TD-SCDMA network parameter whether meet TD-SCDMA network launchQuality requirement. Final by the dynamic auto selection of index of correlation and handover network WiFi network orTD-SCDMA network, the video data receiving to send video front-end equipment. When the network of two-fortyPoor quality or while not covering, gateway is connected to the network of low rate automatically, has ensured wireless videoQuality.
And, according to the demand of wireless video, anti-according to the quality of wireless network forward end encoder detectingFeedback signal, adjusts coding format for head end encoder. Meanwhile, for the requirement of wireless video, spy is setFixed data buffer storage and error retransmission mechanism. Meet the application of wireless video under several scenes, many-sideMulti-angle has ensured the quality of wireless video.
Are the control method schematic flow sheets that are applied to wireless video system referring to accompanying drawing 2, specifically comprise followingStep:
Step 201, connection WiFi network.
Because the transmission speed of WiFi network is far above the transmission speed of TD-SCDMA network, therefore at thisThe preferential WiFi network that detects in invention, when WiFi network does not exist or its transmission speed does not meet transmission requirementTime, then detect TD-SCDMA network. WiFi network comprises 802.11n, 802.11g and 802.11b netNetwork, by the height of transfer rate, attempts connecting 802.11n, 802.11g and 802.11bWiFi network successively.
Attempt to connect WiFi network, perform step 202 if be connected to WiFi network; Otherwise, carry out stepRapid 203.
Step 202, judge that signal power is less than the first thresholding.
Success connects wifi network and sends initialize data stream, detects the signal power of received WiFi network.If the value of signal power is less than the first thresholding, illustrate that WiFi network does not meet transmission requirement, execution step203; If the value of signal power is more than or equal to the first thresholding, illustrate that WiFi network meets transmission requirement,Execution step 207, sends video data by WiFi network. The first threshold value is of living according to wireless video systemLocation positioning. Wireless video system is in indoor environment, and the first threshold value equals-70 dBms(dbm); Wireless video system in outdoor environment, equal-85dbm of the first threshold value.
Step 203, judge and in TD-SCDMA, have High Speed Uplink Packet access (HSUPA) pattern.
HSUPA pattern in TD-SCDMA is a kind of high speed transmission data network, in judgementWhen TD-SCDMA, first judge whether to have HSUPA pattern, if there is HSUPA patternSend initialize data and flow and perform step 204, judge whether the network of HSUPA pattern meets transmission requirement;If there is not HSUPA pattern, perform step 205, judge whether the network of non-HSUPA pattern meetsTransmission requirement.
Step 204, judge that the Block Error Rate of TD-SCDMA is greater than the second threshold value.
If the Block Error Rate of TD-SCDMA is greater than the second threshold value, TD-SCDMAHSUPA mould is describedThe network of formula does not meet transmission quality requirements, execution step 205; If the Block Error Rate of TD-SCDMA is less than etc.In the second threshold value, illustrate that the network of TD-SCDMAHSUPA pattern meets transmission quality requirements, holdRow step 207, utilizes TD-SCDMA network to send video data. For example the second threshold value equals 0.05.
Step 205, according to non-HSUPA pattern transmitting initialize data stream.
If there is not network or the TD-SCDMAHUSPA pattern of TD-SCDMAHUSPA patternNetwork do not meet transmission quality requirements, according to non-HSUPA pattern transmitting initialize data stream, to judgeWhether the TD-SCDMA network of non-HSUPA pattern meets transmission quality requirements.
Step 206, judge that the Block Error Rate of TD-SCDMA is greater than the 3rd threshold value.
If the Block Error Rate of TD-SCDMA is greater than the 3rd threshold value, illustrate that TD-SCDMA network does not meetTransmission quality requirements, attempts connecting WiFi network execution step 201 again; If the mistake piece of TD-SCDMARate is less than or equal to the 3rd threshold value, illustrates that TD-SCDMA network meets transmission quality requirements, carries out stepRapid 207, utilize TD-SCDMA network to send video data. For example the 3rd threshold value equals 0.1.
Step 207, transmitting video data.
Utilize WiFi network or TD-SCDMA network transmitting video data. Still monitor the matter of wireless networkAmount, if when current wireless link fails can not meet transmission needs, be switched at once the good nothing of qualityOn spider lines.
Step 201-step 207 dynamically judges the quality of wireless network successively by threshold value, if current nothingWired link goes wrong and is switched to immediately on other wireless network suiting the requirements.
In addition, can also adjust video data format according to wireless network transmissions rate dynamic, and then ensureThe quality of wireless video.
In the present invention, to be from high to low three kinds be D1 form, standardized images lattice to the form of video dataFormula CIF and working standard picture format (QCIP). When network transmission speed is greater than 350 kilobit rates(kbps), select D1 form; When transfer rate is comprising 350kbps and 100kbps and 350kbpsAnd between 100kbps, select CIF; When transfer rate is less than 100kbps, select QCIF. Different netsThe picture format that network transfer rate is corresponding different, very fast when transmission speed, select the form that data volume is larger;Slower when transmission speed, select the form that data volume is less.
Select different wireless network transmissions video datas, then select different figure according to different transmission speedsPicture form is to ensure the quality of wireless video. In addition, can also and control video from segmentation buffer memory video dataTwo aspects of correctness of data ensure the quality of wireless video.
Be more than or equal to 60kbps in network transfer speeds, use the storage of rattling of two block storages. ?1 clock cycle, is cached to memory module 1 by the video data of input, second clock cycle, by defeatedThe data flow cache entering, to memory module 2, arrives next processing unit by the data importing of memory module 1 simultaneously.So repeatedly, to increase throughput and speed up processing. When network transmission speed is less than 60kbps, utilizeAll memory cell buffer memory video datas.
Be less than 60kbps in network transfer speeds, still have the video data that cannot transmit. Now, Ke YitongCross the form that changes video data to reduce the shared memory space of video data. For example, video dataForm is D1, and the D1 of video data is converted to CIF; The form of video data is CIF, by video countsAccording to CIF be converted to QCIF, and utilize whole memory cell buffer memory video datas. And when the lattice of video dataFormula is QCIF, now cannot utilize the form that changes video data to reduce the shared storage sky of video dataBetween. So, abandon video data according to the priority of Video Data Storage time, then utilize all storages singleThe remaining video data of unit's buffer memory.
Adopt in the present invention the correctness of error retransmission mechanism control video data. Specifically refer to:Intelligent gateway carries out redundancy encoding to armed video data, receiving terminal by verification and detect video countsAccording to correctness, if detect correctly this video data of buffer memory of video data; Otherwise transmitting terminal is intelligent networkPass resends described video data. This mechanism can effectively reduce the live load of transmitting terminal.
In addition, transmitting terminal, before resending video data, needs to detect the video data that resendsValidity. The validity of video data refers to, this video data can arrive reception before receiving terminal callsEnd, determines that this video data is effective; Otherwise, determine that this video data is invalid. If to be resendVideo data effectively resends video data; Otherwise, delete video data to be resend.
Transmitting terminal detects the video data resending following two kinds of Starting mode. One is periodically to detectThe validity of video data to be resend; Another kind is to wait to resend with NACK signal detection triggerThe validity of video data. When above-mentioned two kinds of Starting mode overlap, dwelling period detects immediatelyThe validity of video data to be resend, keeps with to be resend the looking of NACK signal detection triggerThe validity of audio data.
Are the intelligent gateway structural representations that are applied to wireless video system referring to accompanying drawing 3, specifically comprise: CPUModule 301, WiFi communication module 302, TD-SCDMA communication module 303, network detection module 304,LAN interface module 305, stores processor module 306 and Error Control module 307.
First, WiFi communication module 302 receives WiFi network signal, and by network-like the WiFi receivingCondition is sent to network detection module 304 by CPU module 301; 303 of TD-SCDMA communication modulesPenetrate initialize data stream, receiving TD-SCDMA network parameter is that TD-SCDMA is or/and TD-SCDMAThe Block Error Rate of two kinds of patterns of HSUPA, and the Block Error Rate of TD-SCDMA is passed through to 301 of CPU modulesDeliver to network detection module 304. Network detection module 304 according to the WiFi network signal power receiving andThe Block Error Rate of TD-SCDMA is selected network, and selection result is sent to CPU module 301; CPU module301 selection results that send according to network detection module 304 send instruction to LAN interface module 305; LANInterface module 305 is by netting twine receiving video data from video front-end equipment, according to 301 of CPU modulesThe instruction of sending sends video data to WiFi communication module 302 or TD-SCDMA by CPU module 301Communication module 303; WiFi communication module 302 or TD-SCDMA communication module 303 are by CPU module301 receive the video data that LAN interface module 305 sends, and launch this video data. Network detection module304 periodically detect WiFi network signal and TD-SCDMA network signal, so that intelligent gateway is selected letterNumber good network carries out the transmission of video data.
Wherein, WiFi communication module 302 comprises the first communication unit, second communication unit and third communication listUnit.
The first communication unit receives the WiFi network signal of supporting 802.11n agreement, by supporting 802.11nThe WiFi network of agreement is launched described video data;
Second communication unit receives the WiFi network signal of supporting 802.11g agreement, by supporting 802.11gThe WiFi network of agreement is launched described video data;
Third communication unit receives the WiFi network signal of supporting 802.11b agreement, by supporting 802.11bThe WiFi network of agreement is launched described video data.
WiFi can be by selecting from high to low WiFi network according to the agreement of WiFi network signal, 802.11n,802.11g or 802.11b.
To adjust the form schematic diagram of video data (other module of intelligent gateway 401 does not exist referring to accompanying drawing 4In Fig. 4), CPU module in intelligent gateway 401 301 according to from WiFi communication module 302 orNetwork parameter forward end encoder 402 feedback signals that TD-SCDMA communication module 303 is obtained, front end is compiledCode device is adjusted the form of video data and inputs intelligent gateway 401 according to network parameter.
In the present invention, to be from high to low three kinds be D1 form, standardized images lattice to the form of video dataFormula CIF and working standard picture format QCIP. When network transmission speed is greater than 350kbps, select D1Form; When transfer rate is comprising between 350kbps and 100kbps and 350kbps and 100kbps,Select CIF; When transfer rate is less than 100kbps, select QCIF. Different network transmission speed correspondences are notSame picture format, very fast when transmission speed, select larger form; Slower when transmission speed, selectSelect less form.
Intelligent gateway also comprises stores processor module 306, and storage processor module is by 301 points of CPU modulesThe video data that section buffer memory LAN interface module 305 receives, and this video data is passed through to CPU module301 are sent to WiFi module 302 or TD-SCDMA module 303. When network transfer speeds is more than or equal to60kbps, stores processor module 306 ping-pong buffer video datas; When network transfer speeds is less than 60kbps,Stores processor module 306 is utilized video data described in whole memory space buffer memorys. Be less than in network transfer speeds, still there is the video data that cannot transmit in 60kbps, and the form of video data is D1 or CIF, by videoThe D1 of data is converted to CIF, or the CIF of video data is converted to QCIF, utilizes whole memory spaces slowDeposit video data; The form of video data is QCIF, abandons video according to the priority of Video Data Storage timeData, utilize the remaining video data of whole memory space buffer memorys.
Intelligent gateway also comprises Error Control module 307. Receiving terminal is according to verification and just detect video dataReally property, detects video data and correctly stores this video data; Detect video data error and send NACKSignal is to intelligent gateway. The request that NACK channel resends.
Error Control module 307 is passed through CPU module from WiFi communication module or TD-SCDMA communication mouldPiece receives the request resending; Detect the validity of the video data of asking, if the video counts of askingAccording to effectively, send to WiFi communication module or TD-SCDMA communication module by CPU module 301The video data of asking; If the video data of asking is invalid, do not send asked data.
Are wireless video system framework maps of application intelligent gateway referring to accompanying drawing 5, wherein video front-end equipment is completeBecome the work such as video image acquisition, analog-to-digital conversion, compressed encoding; Intelligent gateway is responsible for the transmission of data signalAnd reception, select and handover network buffer memory video data and error retransmission. Intelligent gateway is selected TD-SCDMANetwork base station or WiFi Network Access Point send video data. The wireless video system of application intelligent gateway canIn time select preferably Internet Transmission video data according to the situation of network, ensured the quality of wireless video.
The above, be only preferred embodiment of the present invention, is not intended to limit protection of the present inventionScope. Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc.,Within all should being included in protection scope of the present invention.
Claims (17)
1. a control method that is applied to wireless video system, is characterized in that, the method comprises:
Gateway connects video front-end equipment;
Described gateway preferentially detects the signal power of WiFi network, if the value of described power is greater than or is more than or equal toThe first threshold value, the video data of selecting described WiFi network transmitting to receive from video front-end equipment;
If the value of described power is less than the first threshold value, described gateway detects TD-SCDMA network parameter,If meet the requirement of TD-SCDMA network launch mass, select TD-SCDMA network to send from videoThe video data that end equipment receives, otherwise, the signal power of detection WiFi network;
Described detection TD-SCDMA network parameter, if meet the requirement of TD-SCDMA network launch mass,Selecting TD-SCDMA network to send video data comprises:
If judge in TD-SCDMA and have HSUPA pattern, launch initialize data stream, detectThe Block Error Rate of TD-SCDMA system, if described Block Error Rate is less than or equal to the second threshold value, selectsTD-SCDMA network transmitting video data; If described Block Error Rate is greater than the second threshold value, according to non-HSUPA pattern transmitting initialize data stream; The Block Error Rate that detects TD-SCDMA system, described Block Error Rate is littleIn equaling the 3rd threshold value, utilize TD-SCDMA network transmitting video data;
If judge in TD-SCDMA and do not have HSUPA pattern, pre-according to non-HSUPA pattern transmittingPut data flow, detect the Block Error Rate of TD-SCDMA system, described Block Error Rate is less than or equal to the 3rd threshold value,Utilize TD-SCDMA network transmitting video data;
Described the second threshold value equals 0.05, and described the 3rd threshold value equals 0.1.
2. the control method that is applied to according to claim 1 wireless video system, is characterized in that nothingLine video system is in indoor environment, and described the first threshold value equals-70 dBm dbm; WirelessVideo system in outdoor environment, described equal-85dbm of the first threshold value.
3. the control method that is applied to according to claim 1 wireless video system, is characterized in that, instituteState WiFi network and comprise any one WiFi network in 802.11n, 802.11g and 802.11b.
4. the control method that is applied to according to claim 1 wireless video system, is characterized in that, instituteThe method of stating further comprises, in the time selecting network, according to selected network transmission speed dynamically adjust send outThe video data format of penetrating.
5. the control method that is applied to according to claim 4 wireless video system, is characterized in that, instituteState and dynamically adjust according to network transmission speed the video data format of launching and comprise: when network transmission speed largeIn 350 kilobit rate kbps, select D1 form; When transfer rate is comprising 350kbps and 100kbpsAnd between 350kbps and 100kbps, choice criteria picture format CIF; When transfer rate is less than100kbps, selects working standard picture format QCIF.
6. the control method that is applied to according to claim 1 wireless video system, is characterized in that, instituteThe method of stating further comprises, selecting before network, and segmentation buffer memory video data.
7. the control method that is applied to according to claim 6 wireless video system, is characterized in that, instituteThe network transfer speeds of selecting is more than or equal to 60kbps, and described segmentation buffer memory video data comprises that ping-pong buffer looksAudio data;
Selected network transfer speeds is less than 60kbps, and described segmentation buffer memory video data comprises that utilization allMemory cell buffer memory video data.
8. the control method that is applied to according to claim 7 wireless video system, is characterized in that, ifThe form of video data is D1 or CIF, and the whole memory cell buffer memory of described utilization video data comprises: will lookThe D1 of audio data is converted to CIF or the CIF of video data is converted to QCIF, utilizes whole memory cellBuffer memory video data.
9. the control method that is applied to according to claim 7 wireless video system, is characterized in that, ifThe form of video data is QCIF, and the whole memory cell buffer memory of described utilization video data comprises: according to videoThe sequencing of time data memory abandons video data, utilizes the remaining video counts of whole memory cell buffer memorysAccording to.
10. be applied to an intelligent gateway for wireless video system, be positioned at video front-end equipment withBetween TD-SCDMA network base station and WiFi Network Access Point, it is characterized in that described intelligent gateway bagDraw together,
CPU module, sends instruction to LAN interface for the selection result sending according to network detection moduleModule;
WiFi communication module, for receiving WiFi network signal, and the WiFi network parameter receiving is logicalCross CPU module and be sent to network detection module, receive looking of LAN interface module transmission by CPU moduleAudio data, launches described video data;
TD-SCDMA communication module, for receiving TD-SCDMA network signal, and will receiveTD-SCDMA network parameter is sent to network detection module by CPU module, receives by CPU moduleThe video data that LAN interface module sends, launches described video data;
Network detection module, for the WiFi network signal power that receives according to WiFi communication module andThe network parameter of the TD-SCDMA that TD-SCDMA communication module obtains is selected network, by selection resultBe sent to CPU module; Wherein, if the value of the signal power of WiFi network is greater than or is more than or equal to firstLimit value, the video data of selecting described WiFi network transmitting to receive from video front-end equipment; If WiFi netThe value of the signal power of network is less than the first threshold value, detects TD-SCDMA network parameter, if meetThe requirement of TD-SCDMA network launch mass, selects TD-SCDMA network to send from video front-end equipmentThe video data receiving, otherwise, the signal power of detection WiFi network; Wherein, detect TD-SCDMANetwork parameter, if meet the requirement of TD-SCDMA network launch mass, selects TD-SCDMA network to send outSend video data to comprise: there is HSUPA pattern if judge in TD-SCDMA, launch initialize data stream,Detect the Block Error Rate of TD-SCDMA system, if described Block Error Rate is less than or equal to the second threshold value, selectTD-SCDMA network transmitting video data; If described Block Error Rate is greater than the second threshold value, according to non-HSUPA pattern transmitting initialize data stream; The Block Error Rate that detects TD-SCDMA system, described Block Error Rate is littleIn equaling the 3rd threshold value, utilize TD-SCDMA network transmitting video data; If judge TD-SCDMAIn there is not HSUPA pattern,, according to non-HSUPA pattern transmitting initialize data stream, detectThe Block Error Rate of TD-SCDMA system, described Block Error Rate is less than or equal to the 3rd threshold value, utilizes TD-SCDMANetwork transmitting video data; Described the second threshold value equals 0.05, and described the 3rd threshold value equals 0.1;
LAN interface module, for from video front-end equipment receiving video data, sends out according to CPU moduleIt is logical to WiFi communication module or TD-SCDMA that the instruction of sending sends described video data by CPU moduleLetter module.
11. are applied to the intelligent gateway of wireless video system according to claim 10, it is characterized in that,Described TD-SCDMA communication module is further used for launching initialize data stream, receive TD-SCDMA or/With the Block Error Rate of TD-SCDMAHSUPA pattern, and described Block Error Rate is sent to net by CPU moduleNetwork detection module;
Described network detection module is further used for selecting network according to the Block Error Rate of TD-SCDMA.
12. are applied to the intelligent gateway of wireless video system according to claim 10, it is characterized in that,Described WiFi communication module comprises,
The first communication unit, for receiving the WiFi network signal of supporting 802.11n agreement, by supportingThe WiFi network of 802.11n agreement is launched described video data;
Second communication unit, for receiving the WiFi network signal of supporting 802.11g agreement, by supportingThe WiFi network of 802.11g agreement is launched described video data;
Third communication unit, for receiving the WiFi network signal of supporting 802.11b agreement, by supportingThe WiFi network of 802.11b agreement is launched described video data.
13. are applied to the intelligent gateway of wireless video system according to claim 10, it is characterized in that,Described CPU module is further used for according to network parameter forward end encoder feedback signal.
14. are applied to the intelligent gateway of wireless video system according to claim 10, it is characterized in that,Described intelligent gateway further comprises stores processor module, for connecing by CPU module segmentation buffer memory LANThe video data that mouth module receives, and described video data is sent to WiFi communication by CPU moduleModule or TD-SCDMA communication module.
15. according to the intelligent gateway that is applied to wireless video system described in claim 14, it is characterized in that,WiFi network transfer speeds or TD-SCDMA network transfer speeds are more than or equal to 60 kilobit rate kbps,Described stores processor module is further used for receiving described video data by CPU module, described in ping-pong bufferVideo data;
WiFi network transfer speeds or TD-SCDMA network transfer speeds are less than 60kbps, described depositoryReason module is further used for receiving described video data by CPU module, utilizes whole memory space buffer memory instituteState video data.
16. according to the intelligent gateway that is applied to wireless video system described in claim 15, it is characterized in that,WiFi network transfer speeds or TD-SCDMA network transfer speeds are less than 60kbps,
Still have the video data that cannot transmit, and the form of video data is D1 or CIF, described depositoryReason module is further used for, and the D1 of video data is converted to CIF or the CIF of video data is converted toQCIF, utilizes video data described in whole memory space buffer memorys;
Still have the video data that cannot transmit, and the form of video data is QCIF, described stores processor mouldPiece is further used for, and abandons video data according to the priority of Video Data Storage time, utilizes all storages emptyBetween the remaining video data of buffer memory.
17. 1 kinds of wireless video systems, is characterized in that, comprise video front-end equipment, intelligent gateway,TD-SCDMA network base station and WiFi Network Access Point, video front-end equipment sends video data to intelligenceGateway, intelligent gateway selects TD-SCDMA network base station or WiFi Network Access Point to send video data;
Described intelligent gateway comprises,
CPU module, sends instruction to LAN interface for the selection result sending according to network detection moduleModule;
WiFi communication module, for receiving WiFi network signal, and the WiFi network condition receiving is logicalCross CPU module and be sent to network detection module, receive looking of LAN interface module transmission by CPU moduleAudio data, launches described video data;
TD-SCDMA communication module, for receiving TD-SCDMA network signal, and will receiveTD-SCDMA network parameter is sent to network detection module by CPU module, receives by CPU moduleThe video data that LAN interface module sends, launches described video data;
Network detection module, for the WiFi network signal power that receives according to WiFi communication module andThe network parameter of the TD-SCDMA that TD-SCDMA communication module obtains is selected network, by selection resultBe sent to CPU module; Wherein, if the value of the signal power of WiFi network is greater than or is more than or equal to firstLimit value, the video data of selecting described WiFi network transmitting to receive from video front-end equipment; If WiFi netThe value of the signal power of network is less than the first threshold value, detects TD-SCDMA network parameter, if meetThe requirement of TD-SCDMA network launch mass, selects TD-SCDMA network to send from video front-end equipmentThe video data receiving, otherwise, the signal power of detection WiFi network; Wherein, detect TD-SCDMANetwork parameter, if meet the requirement of TD-SCDMA network launch mass, selects TD-SCDMA network to send outSend video data to comprise: there is HSUPA pattern if judge in TD-SCDMA, launch initialize data stream,Detect the Block Error Rate of TD-SCDMA system, if described Block Error Rate is less than or equal to the second threshold value, selectTD-SCDMA network transmitting video data; If described Block Error Rate is greater than the second threshold value, according to non-HSUPA pattern transmitting initialize data stream; The Block Error Rate that detects TD-SCDMA system, described Block Error Rate is littleIn equaling the 3rd threshold value, utilize TD-SCDMA network transmitting video data; If judge TD-SCDMAIn there is not HSUPA pattern,, according to non-HSUPA pattern transmitting initialize data stream, detectThe Block Error Rate of TD-SCDMA system, described Block Error Rate is less than or equal to the 3rd threshold value, utilizes TD-SCDMANetwork transmitting video data; Described the second threshold value equals 0.05, and described the 3rd threshold value equals 0.1;
LAN interface module, for by netting twine from video front-end equipment receiving video data, according to CPUThe instruction that module sends send described video data to WiFi communication module by CPU module orTD-SCDMA communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110084894.3A CN102740415B (en) | 2011-04-02 | 2011-04-02 | One is applied to wireless video system, control method and intelligent gateway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110084894.3A CN102740415B (en) | 2011-04-02 | 2011-04-02 | One is applied to wireless video system, control method and intelligent gateway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102740415A CN102740415A (en) | 2012-10-17 |
| CN102740415B true CN102740415B (en) | 2016-05-25 |
Family
ID=46994983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110084894.3A Active CN102740415B (en) | 2011-04-02 | 2011-04-02 | One is applied to wireless video system, control method and intelligent gateway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102740415B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111314661A (en) * | 2020-02-26 | 2020-06-19 | 倪东杰 | Video acquisition and transmission equipment and system |
| CN115460149A (en) * | 2022-10-20 | 2022-12-09 | 广州河东科技有限公司 | Gateway selection method and storage medium in multi-gateway environment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204114A (en) * | 2005-04-28 | 2008-06-18 | 高通股份有限公司 | Wireless handoffs between multiple wireless networks |
| CN101345981A (en) * | 2007-07-13 | 2009-01-14 | 华为技术有限公司 | Network selection method, communication system and mobile terminal |
| CN101384084A (en) * | 2008-10-15 | 2009-03-11 | 北京邮电大学 | Network terminal selection method and device in heterogeneous network |
| CN101951652A (en) * | 2010-08-13 | 2011-01-19 | 北京携远天成技术有限公司 | Method for automatically switching WiFi and 3G in video transmission |
-
2011
- 2011-04-02 CN CN201110084894.3A patent/CN102740415B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101204114A (en) * | 2005-04-28 | 2008-06-18 | 高通股份有限公司 | Wireless handoffs between multiple wireless networks |
| CN101345981A (en) * | 2007-07-13 | 2009-01-14 | 华为技术有限公司 | Network selection method, communication system and mobile terminal |
| CN101384084A (en) * | 2008-10-15 | 2009-03-11 | 北京邮电大学 | Network terminal selection method and device in heterogeneous network |
| CN101951652A (en) * | 2010-08-13 | 2011-01-19 | 北京携远天成技术有限公司 | Method for automatically switching WiFi and 3G in video transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102740415A (en) | 2012-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105472477B (en) | A kind of data transmission method, device and equipment | |
| CN104683863A (en) | Method and equipment for multimedia data transmission | |
| CN1285550A (en) | Data packet bus based packet head coding method and equipment thereof | |
| US20080013613A1 (en) | Method and system for controlling multimedia communication quality in a handheld device | |
| CN103647954A (en) | Mobile video monitoring system based on 3G channel and intelligent terminal | |
| CN102821361B (en) | Communication equipment, communication means and communication system | |
| CN101938653A (en) | Method, device and system for acquiring television picture in real time and transmitting to mobile terminal | |
| CN103607665A (en) | Multilink wireless real-time video transmission method and system | |
| EP2051538A1 (en) | Mobile receiving device, method and media stream selecting device | |
| CN115460333B (en) | Image signal processing module, chip, electronic device and method | |
| CN101989902A (en) | Data retransmission method and device | |
| CN101272482A (en) | Method and system for network media communication long-range control and media capturing equipment | |
| CN104427286A (en) | Method and system for making video call | |
| CN110266437A (en) | It throws screen message method, throw screen message treatment method, device and terminal | |
| CN102740415B (en) | One is applied to wireless video system, control method and intelligent gateway | |
| CN104703051A (en) | Code stream transmitting method and code stream transmitting device | |
| CN106911909A (en) | Video call method and system based on intelligent camera | |
| CN108696720B (en) | Video scheduling system and method suitable for satellite communication | |
| CN101795403A (en) | Video transmission method and system | |
| KR20070026109A (en) | System for transmitting and receiving data, transmitting apparatus, receiving apparatus, and method for transmitting and receiving data | |
| CN103428493A (en) | Light wireless transmission system for high-definition videos | |
| CN108184084A (en) | The video-signal transmission method and device of intercom | |
| CN100586179C (en) | Intelligent domestic gateway presentation video control method and system thereof | |
| CN201123043Y (en) | Household wireless multimedia game system | |
| CN109618128A (en) | Wireless video multi-hop transmission system under a kind of car networking environment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |