CN101841689A - Video call connecting method based on H.245 - Google Patents
Video call connecting method based on H.245 Download PDFInfo
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- CN101841689A CN101841689A CN 201010166896 CN201010166896A CN101841689A CN 101841689 A CN101841689 A CN 101841689A CN 201010166896 CN201010166896 CN 201010166896 CN 201010166896 A CN201010166896 A CN 201010166896A CN 101841689 A CN101841689 A CN 101841689A
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Abstract
The invention relates to a method for establishing wireless video call. The method comprises the following steps: firstly, carrying out initialization processing on relevant H.245 protocol stack, and acquiring local-end multimedia audio-video capability information; then generating signaling corresponding to MSD, OLC, MES and the like according to the description about the audio-video media attribute in a capability interaction message in H.245 protocol; and then combining the generated H.245 signaling into one strip to be transmitted to an opposite end, sending multiple OLC signaling according to the supported multiple media formats, after the opposite end receives the signaling, matching with the media format supported by the local end, finding the excellent media format according to priority, replying an ACK response to the opposite end and simultaneously starting to send the media stream with the format. The method reduces the negotiation and interaction times to be only one, thus greatly reducing the time of session establishment.
Description
Technical field
The present invention relates to the method that the conversation of a kind of wireless video is set up, particularly a kind of being used for realized the method for attachment that multimedia remote is communicated by letter between the terminal or between terminal and the system.
Background technology
Video telephone is the key that the 3G business is carried out, and is the scheme of maximum wireless network video session business of present usefulness based on Circuit-switched H.324M/3G-324M agreement.But interoperability issue common among the 3G-324M is perplexing communication industry always, and the session of 3G-324M is long settling time, has a strong impact on user experience.
Referring to accompanying drawing one, it is the mutual schematic diagram of the present 3G-324M signaling of using, as can be seen from the figure, its video calling method of attachment is: local side sends MSD (principal and subordinate reach an agreement on message), wait for the ACK (receiveing the response) of opposite end after, send TCS (terminal capability negotiation message) again, after waiting for the ACK (receiveing the response) of opposite end, send OLC (opening logical channel message) again, behind the ACK (receiveing the response) of wait opposite end, send MES (multi-meter message transfer) again; The foundation that is the conversation of 3G-324M pattern need be experienced principal and subordinate's agreement (MSD MasterSlaveDetermation), terminal capability negotiation (TCSTerminalCapabilitySet), open logical channel (OLC OpenLogicalChannel) and multi-meter transmission processes such as (MES MultiplexEntrySend), and each process all needs to await a response, just can enter next process, therefore, prolonged the time that video calling is set up.And different terminals and system will realize video calling, need to determine by which type of media formats to be undertaken alternately, this also is necessary.
H.245 be the control signaling protocol in the multimedia communication system, be mainly used in the end-to-end H.245 signaling exchange of the terminal point that is in the communication or terminal room.H.245 H.245 control information is transmitting on the control channel.This control channel is fixed, and is permanent open, and this is also inequality with media channel, and the information that is transmitted comprises the information of terminal switch ability and opens and close information such as logic channel.Therefore, in technology and application facet, remain further research and development based on the video calling method of attachment of signaling H.245.
Summary of the invention
The purpose of this invention is to provide a kind of simple, convenient, and can effectively reduce set up the air time based on the H.245 video calling method of attachment of signaling.
For achieving the above object, the technical solution used in the present invention is: provide a kind of based on the H.245 video calling method of attachment of signaling, it is characterized in that comprising the steps:
Step 1: local side send to be consulted needed all signalings H.245 to the opposite end;
Step 2: compare with its media formats of supporting after receiving the signaling that local side sends in the opposite end, and the priority that is arrived by media formats is different determines priority, selects a kind of media formats to reply;
Step 3: after local side receives the signaling of answer, close the logical channel of other form, the Media Stream consistent with the media formats of the answer of receiving sent.
Principle of the present invention is: utilize existing H.245 signaling, video calling is set up needed MSD, OLC, signaling messages such as MES merge into one and send to the opposite end, and in conjunction with different media formats, send many signalings that OLC is different.The ACK message that reply the opposite end also is to merge into one to send over, thereby reduces the number of times of Signalling exchange, saves the mutual time.Adopt the transmission technology scheme of many OLC signalings, avoided the restriction of TCS signaling answer by the time.
The present invention compared with prior art has following advantage:
(1) realizes that accurately and fast terminal multi-media ability attribute communications is mutual, improve video calling and set up speed.
(2) can utilize existingly, not need to redesign coded system again, and be easy to realize intercommunication, the compatibility of different terminals based on the encoding and decoding technique of agreement H.245.
(3) transmission of many OLC signalings signaling that all can be needed send together, must wait until before having avoided that the response of TCS signaling just can carry out the restriction of the transmission of OLC signaling.
Description of drawings
Fig. 1 is the mutual schematic diagram of prior art 3G-324M signaling;
Fig. 2 be one embodiment of the invention provide a kind of based on the Signalling exchange schematic diagram of the video calling method of attachment of signaling H.245;
Fig. 3 be another embodiment of the present invention provide a kind of based on the Signalling exchange schematic diagram of the video calling method of attachment of signaling H.245;
Fig. 4 be the present invention also have that an embodiment provides a kind of based on the Signalling exchange schematic diagram of the video calling method of attachment of signaling H.245.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one: referring to shown in Figure 2, present embodiment provides a kind ofly comprises the steps: based on the video calling method of attachment of signaling H.245
Step 1: send the H.245 message that multi-ribbon has local media information to the opposite end, open the logical channel signaling in every message, different according to the difference of media formats.
Step 2: from the media information of coming in the opposite end, (but be that H264＞MPEG4＞H263) seeks a kind of media formats of supporting in proper order as setting priority according to priority preset.Reply confirmation, and begin to send the Media Stream of this form simultaneously.
Step 3: by the answer of opposite end, determine a kind of media information, abandon other video media forms as mutual form.
Step 4: send confirmation to the opposite end.
Step 5: unusual if the opposite end occurs, repeat the first step.
Embodiment two: referring to shown in Figure 3, the step that the technical scheme that present embodiment provides comprises is as follows:
Step 1: send a H.245 message that comprises local all media informations of supporting to the opposite end circulation.
Step 2: from the media information of coming in the opposite end, seek a kind of media formats of supporting according to priority preset.Reply confirmation, begin to send the Media Stream of this form simultaneously.
Step 3: by the answer of opposite end, determine a kind of media information, abandon other video media forms as mutual form.
Step 4: send confirmation to the opposite end.
Step 5: unusual if the opposite end occurs, repeat the first step.
Embodiment three: referring to shown in Figure 4, the step that the technical scheme that present embodiment provides comprises is as follows:
Step 1: send many H.245 message that comprise the local various media informations of supporting to the opposite end, and send an end signaling after these several message, just media information has sent and has finished.
Step 2: from the media information of coming in the opposite end, seek a kind of media formats of supporting according to priority preset.Reply confirmation, and send the Media Stream of this form simultaneously.
Step 3: by the answer of opposite end, determine a kind of media information, abandon other video media forms as mutual form.
Step 4: send confirmation to the opposite end.
Step 5: unusual if the opposite end occurs, repeat the first step.
Claims (1)
1. one kind based on the H.245 video calling method of attachment of signaling, it is characterized in that comprising the steps:
Step 1: local side send to be consulted needed all signalings H.245 to the opposite end;
Step 2: compare with its media formats of supporting after receiving the signaling that local side sends in the opposite end, and the priority that is arrived by media formats is different determines priority, selects a kind of media formats to reply;
Step 3: after local side receives the signaling of answer, close the logical channel of other form, the Media Stream consistent with the media formats of the answer of receiving sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010166896 CN101841689A (en) | 2010-05-10 | 2010-05-10 | Video call connecting method based on H.245 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010166896 CN101841689A (en) | 2010-05-10 | 2010-05-10 | Video call connecting method based on H.245 |
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| CN101841689A true CN101841689A (en) | 2010-09-22 |
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| CN 201010166896 Pending CN101841689A (en) | 2010-05-10 | 2010-05-10 | Video call connecting method based on H.245 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101827243A (en) * | 2010-05-20 | 2010-09-08 | 苏州新海宜通信科技股份有限公司 | Method for connecting H.245 signaling-based video call |
| CN113141352A (en) * | 2021-03-26 | 2021-07-20 | 深圳市捷视飞通科技股份有限公司 | Multimedia data transmission method and device, computer equipment and storage medium |
| CN115967834A (en) * | 2023-01-28 | 2023-04-14 | 龙迅半导体（合肥）股份有限公司 | Multimedia data transmission device and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483825A (en) * | 2008-01-07 | 2009-07-15 | 昊迪移通(北京)技术有限公司 | Fast call establishing method oriented to video call on 3G circuit switching network |
-
2010
- 2010-05-10 CN CN 201010166896 patent/CN101841689A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483825A (en) * | 2008-01-07 | 2009-07-15 | 昊迪移通(北京)技术有限公司 | Fast call establishing method oriented to video call on 3G circuit switching network |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101827243A (en) * | 2010-05-20 | 2010-09-08 | 苏州新海宜通信科技股份有限公司 | Method for connecting H.245 signaling-based video call |
| CN113141352A (en) * | 2021-03-26 | 2021-07-20 | 深圳市捷视飞通科技股份有限公司 | Multimedia data transmission method and device, computer equipment and storage medium |
| CN115967834A (en) * | 2023-01-28 | 2023-04-14 | 龙迅半导体（合肥）股份有限公司 | Multimedia data transmission device and method |
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Open date: 20100922 |