CN100583823C - Method, device and system for controlling fluid medium broadcast - Google Patents
Method, device and system for controlling fluid medium broadcast Download PDFInfo
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- CN100583823C CN100583823C CN200610078379A CN200610078379A CN100583823C CN 100583823 C CN100583823 C CN 100583823C CN 200610078379 A CN200610078379 A CN 200610078379A CN 200610078379 A CN200610078379 A CN 200610078379A CN 100583823 C CN100583823 C CN 100583823C
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Abstract
The invention discloses a media flow broadcast control method, comprising: media flow server provides a variety of code flow for a same media flow program, the media flow receiving client obtain the range of code flow of media flow program, the user choose a transmission code flow according to the range of code flow, the said media flow receiving client report to the said media flow server; the media flow server play the said media flow program with the transmission code flow the user choose. The invention also provides corresponding media flow server, media flow receiving client and media flow broadcast system. Use this invention can be simply actualize the user freely choose broadcast code flow of media flow; fully guarantee the broadcast quality of media flow.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of flow medium play control method, and corresponding streaming media server, stream media receiving client terminal and Play System.
Background technology
Streaming Media refers to use the continuous time-base media of stream transmission technology in Internet/Intranet, as: audio frequency, video or multimedia file.Streaming Media is not downloaded whole file before broadcast, only will begin partial content deposits buffer memory in, and the remainder of file will be continued to download in server by the backstage when playing.The key technology that Streaming Media is realized is transmitted as a stream exactly.
The key problem of restriction Streaming Media broadband application development at present is service quality.There are two problems in the program request of Streaming Media at present:
1, because the situation instability of internet, its bandwidth, load etc. change violent, and the code stream of source of media is thick-and-thin, and this will cause plays unfavorable condition such as get stuck, delay, video quality shake are violent, makes a big impact for user's browsing video.
2, the terminal access bandwidth of the same source of media of program request possibility difference is very big, the terminal that has may be 100,000,000 accesses, has plenty of the modem dial-up access, but the code stream of source of media has only one, so just cause the high client of bandwidth to can not get better visual effect, the client's that bandwidth is low video quality also can not get ensureing.
Real-time streaming protocol (Real Time Streaming Protocol, RTSP) by RealNetworks and the common proposition of Netscape, this protocol definition one-to-many application how transmit multi-medium data by IP network effectively, be provided for the remote control function of audio and video stream, as stop, F.F., rewind down and be redirected etc.(Real-timeTransport Protocol, (Real-time Transport ControlProtocol RTCP) is responsible for the RTP/ RTCP Real-time Transport Control Protocol by RTP for the transmission of packet and packet loss statistics.Real-time streaming protocol has become the standard agreement rfc2326 of Streaming Media transmission.
Occurred a kind of many code streams compress technique in the prior art, promptly same media file can provide a plurality of code streams when encoding compression.Media server can select certain code stream to send at any time.
RSVP (Resource Reservation Protocol, RSVP) be service quality assurance (the Quality of Service of a standard, QoS) signaling protocol, it allows dynamically to set up QoS end to end, and certain bandwidth is reserved in application on the transmitting terminal of data and the network link between the receiving terminal.
Data communication at present online a lot of Service Gateways all provide the user can in please improve the function of access bandwidth temporarily.Access bandwidth as certain user is 1M bps, but wishes certain film of program request 2.5M bps code stream, and then the user can apply for the access bandwidth of oneself is brought up to 2.5M bps temporarily.
The patent No. is that the patent application document of CN03157182.4 discloses a kind of flow media playing method, and its technology realizes mainly comprising the steps:
A. initiator and recipient set up the talkie trunk road, and initiator and recipient detect peripheral capabilities separately simultaneously, and in the following time of condition of network bandwidth permission video transmission, both call sides can select vision signal to begin conversation;
B. with this moment video window and transmission rate as benchmark; Send the service quality test pack, the packet loss of test network;
If c. there is not packet loss or very little substantially, then suitably transfers big video window, increase transmission rate;
If d. packet loss is less than 30%, then suitably turn video window down, reduce transmission rate;
If e. packet loss is greater than 30%, think that then network condition can't satisfy the requirement of this media file video transmission, finish conversation
There is following shortcoming in above-mentioned prior art:
(1) can only after broadcast, adjust transmission rate automatically, can't before streaming media playing, select a suitable code stream by the user.
(2) in the playing process, the statistics packet loss that server need not stop with a large amount of clients, adjust code stream, the resource that can consume server changes when frequent in network condition, can cause white elephant to server.
(3) network condition changes when frequent, and picture dimension or playback rate can not stop to change, and gives user's sensory effects bad.
(4) the code stream adjusting range is little, and packet loss must disconnect greater than 30% and connecting, and can not adapt to the various bandwidth range of user.
(5) client is not known the code stream scope of source of media, so can't use resource reservation protocol (rsvp) application bandwidth reserved or to the bigger access bandwidth of Service Gateway application.
(6) adjust transmission rate according to the statistics of packet loss, can't accomplish in time, monitor exactly the variation of bandwidth.
Summary of the invention
The invention provides a kind of flow media playing method, can not be in order to what exist in the solution prior art by the problem of stream media receiving client terminal user Autonomous Control streaming media playing.
According to method provided by the invention, the present invention provides corresponding streaming media server, stream media receiving client terminal and Play System in addition.
The inventive method is: streaming media server provides multiple code stream for same flow-medium performance, and adopts real-time streaming protocol RTSP between described streaming media server and the stream media receiving client terminal, comprises the following steps:
A, described stream media receiving client terminal send the code stream query messages to described streaming media server, carry the global resource identifiers, URIs of method GET_PARAMETER that RTSP provides, media file correspondence that request is play and the Bitrate title of indication code stream information;
Behind its support of described streaming media server judges Bitrate title, return success message, carry the code stream scope corresponding with described media file;
B, user select a kind of transmission code stream according to described code stream scope, report described streaming media server by described stream media receiving client terminal;
The transmission code stream that C, described streaming media server adopt the user to select is play described flow-medium performance.
According to said method of the present invention, when described stream media receiving client terminal program request flow-medium performance, initiate the code stream query requests to described streaming media server;
After described streaming media server is received the code stream query requests, the code stream scope of flow-medium performance of inquiry program request, and send to described stream media receiving client terminal and be shown to the user.
Among the described step B, any time of user before stream media receiving client terminal begins the playing stream media program or in playing process, select a kind of transmission code stream to report described streaming media server by described stream media receiving client terminal.
According to said method of the present invention, also comprise among the described step B:
By the end-to-end bandwidth guarantee between RSVP application of described stream media receiving client terminal use RSVP and the described streaming media server.
According to said method of the present invention, also comprise among the described step B:
Improve access bandwidth by described stream media receiving client terminal to the Service Gateway application.
Described streaming media server comprises for same flow-medium performance provides multiple code stream:
Described streaming media server is the media file that same flow-medium performance generates a plurality of single bit streams; Perhaps
Described streaming media server is the media file that same flow-medium performance generates code stream more than.
When described streaming media server was the media file of same flow-medium performance generation code stream more than, described step B comprised:
B11, described stream media receiving client terminal send to described streaming media server and revise code flow message, carry method SET_PARAMETER that RTSP provides or PLAY, the URI of media file correspondence, the Range title and the Bitrate title of expression reproduction time scope, and indicate the code stream of stream media receiving client terminal user selection with the Bitrate title;
Behind B12, its support of the described streaming media server judges Bitrate title, return success message;
Described step C comprises:
Described streaming media server is in the time range of Range title appointment, and the code stream that the user who adopts the Bitrate title to indicate selects is play described flow-medium performance.
When described streaming media server is a same flow-medium performance when generating the media file of a plurality of single bit streams, described step B comprises:
B21, described stream media receiving client terminal send to described streaming media server and revise code flow message, carry method SET_PARAMETER that RTSP provides or PLAY, the URI of current media file correspondence, the Range title and the Bitrate title of expression reproduction time scope, and indicate the code stream of stream media receiving client terminal user selection with the Bitrate title;
Behind B22, its support of the described streaming media server judges Bitrate title, the code stream according to the stream media receiving client terminal user selects matches the new URI corresponding with this code stream media file;
B23, new URI is attached behind the Location title that RTSP provides, send redirect command to described stream media receiving client terminal;
B24, described stream media receiving client terminal disconnect the session with current old URI, obtain the media description information of described new URI, and the session of foundation and described new URI;
Described step C comprises:
Described streaming media server is in the time range of Range title appointment, and the code stream that the user who adopts the Bitrate title to indicate selects is play described flow-medium performance.
According to said method of the present invention, when it does not support that the Bitrate title maybe can't be carried out when described streaming media server judges, return failed message to described stream media receiving client terminal, carry Fail Type and reason.
The invention provides a kind of streaming media server, and adopt real-time streaming protocol RTSP between the stream media receiving client terminal, comprising:
The media file generation unit for same flow-medium performance generates the media file of code stream more than, or generates the media file of a plurality of single bit streams;
The first code stream query unit, receiving stream media receives client transmitted stream query requests, and described code stream query messages carries the global resource identifiers, URIs of method GET_PARAMETER that RTSP provides, media file correspondence that request is play and the Bitrate title of indication code stream information; After judging support Bitrate title, the code stream scope of the flow-medium performance of inquiry program request, and send to described code stream scope transmitting element;
Code stream scope transmitting element returns the success message that carries the code stream scope corresponding with described media file to stream media receiving client terminal;
First code stream setting/modification performance element, receiving stream media receives the modification code flow message that client is initiated, and obtains the transmission code stream information that the stream media receiving client terminal user selects;
First-class media play unit, the transmission code stream according to the user selects starts the media file of corresponding code stream or adopts this code stream to play described flow-medium performance.
The invention provides provides a kind of stream media receiving client terminal, and adopts real-time streaming protocol RTSP between the streaming media server, comprising:
The second code stream query unit sends the code stream query messages to streaming media server, carries the global resource identifiers, URIs of method GET_PARAMETER that RTSP provides, media file correspondence that request is play and the Bitrate title of indication code stream information;
Code stream scope receiving element, the success message that carries the code stream scope corresponding that the receiving stream media server returns with described media file;
Second code stream setting/modification performance element, the transmission code stream according to the user selects sends the modification code flow message to streaming media server, carries the code stream information that the user selects;
The second streaming media playing unit receives the also flow-medium performance of display stream medium server broadcast.
The present invention provides a kind of stream media play system in addition, adopts real-time streaming protocol RTSP between described streaming media server and the described stream media receiving client terminal, comprises above-mentioned streaming media server provided by the invention and stream media receiving client terminal.
Beneficial effect of the present invention is as follows:
(1) adopts the present invention, streaming media server provides multiple code stream for same flow-medium performance in advance, when stream media receiving client terminal program request flow-medium performance, can initiate the code stream query requests to streaming media server, obtain the code stream scope of the flow-medium performance of program request; The user can select a suitable code stream according to the access bandwidth and the current network conditions of place stream media receiving client terminal before broadcast, report streaming media server, is adopted the code stream playing stream media program of user's selection by streaming media server.Like this, the resource that does not need to take client and server is carried out the statistics of transmission quality (as packet loss), and simple realization is carried out the control that flow-medium performance is play quality by the user.
(2) if because the network condition variation, the flow-medium performance quality that causes playing changes, the user can change transmission code stream by stream media receiving client terminal to the streaming media server request at any time in the playing programs process, play quality to guarantee better flow-medium performance.
(3) adopt the present invention, stream media receiving client terminal can obtain the code stream scope of the flow-medium performance of program request, user's (client) can use resource reservation protocol (rsvp) to apply for bandwidth safeguard end to end according to the code stream scope if want to guarantee video transmission quality end to end; If because access bandwidth is not enough, can be according to the code stream scope, to the suitable access bandwidth of Service Gateway application, to guarantee transmission quality.
(4) the code stream scope of streaming media server of the present invention can be done very extensively, adapts to variety of network conditions.
(5) adopt user of the present invention in time to adjust code stream, avoided the inaccurate and untimely shortcoming when adding up according to packet loss according to the sensory effects of audio/video flow.
Description of drawings
Fig. 1 is embodiment of the invention code stream querying flow figure;
When being provided with many code streams media file for the embodiment of the invention, revises Fig. 2 the code stream flow chart;
Fig. 3 revises the code stream flow chart during a plurality of single bit stream media file for the embodiment of the invention is provided with;
Fig. 4 is a streaming media server structural representation provided by the invention;
Fig. 5 is a stream media receiving client terminal structural representation provided by the invention;
Fig. 6 is a stream media play system structural representation provided by the invention.
Embodiment
Flow medium play control method of the present invention, for providing multiple code stream, same flow-medium performance (generates the media file of a plurality of single bit streams for same flow-medium performance by streaming media server, perhaps be the media file that same flow-medium performance generates code stream more than), when stream media receiving client terminal program request flow-medium performance, carry out the following step:
Stream media receiving client terminal is initiated the code stream query requests to streaming media server, obtains the code stream scope of the flow-medium performance of program request;
The user selects a kind of transmission code stream according to the code stream scope of obtaining, and reports streaming media server by stream media receiving client terminal;
The transmission code stream playing stream media program that streaming media server adopts the user to select.
In said method of the present invention, after streaming media server is received the code stream query requests, the code stream scope of the flow-medium performance of local this program request of preserving of inquiry, and send to stream media receiving client terminal and be shown to the user.
Stream media receiving client terminal can be done following processing after obtaining source of media code stream scope:
(1) before flow-medium performance is play, the user can select a suitable code stream according to the access bandwidth and the current network conditions of place stream media receiving client terminal, sends to streaming media server, and request is by the flow-medium performance of the code stream play-on-demand of selecting;
(2) if because the access bandwidth deficiency, perhaps think to improve the video that access bandwidth is browsed better image quality temporarily, can be according to the code stream scope of obtaining, before flow-medium performance is play, send application with reference to a suitable code stream to Service Gateway and improve access bandwidth (concrete grammar that improves access bandwidth is a prior art, does not describe in detail at this);
Before flow-medium performance is play or in the playing process, if because network link situation more complicated, bandwidth fluctuation is big, can be with reference to concrete numerical value in the code stream scope, between streaming media server and stream media receiving client terminal, carry out resource reservation application (concrete grammar of application resource reservation is a prior art, does not describe in detail at this);
(3) during streaming media playing, if bandwidth changes, the user is definitely under the situation of estimation network link bandwidth, can be by repeatedly initiating to revise code flow message to streaming media server, change transmission code stream, by comparing transmission quality (the audio/video quality of reception), finally select the satisfied relatively code stream of a transmission quality.
Below in conjunction with accompanying drawing, said method of the present invention is described in detail with specific embodiment.
To adopt RTSP agreement of the prior art between Media Stream Play Server and the Media Stream reception client is example.
The RTSP agreement provides the method (Method) of several standards, as disconnect session (TEARDOWN), set up session (SETUP), play (PLAY), suspend (PAUSE), obtain parameter (GET_PARAMETER), parameter (SET_PARAMETER) is set, is redirected (REDIRECT) etc., these Method carry out between the server and client side alternately, the type of expression message.The RTSP protocol definition a lot of titles (Header), the particular content of method for expressing operation is as scope (Range), speed (Speed) and timestamp (Timestamp) etc.For example, stream media receiving client terminal has sent a piece of news to streaming media server, has used the PLAY method, and the value of attaching title Range is npt=10-15, and the expression stream media receiving client terminal wishes to play (PLAY) from the 10-15 video clips of second; If streaming media server is supported this order, just return a 200OK message.
The title (Bitrate) of the present invention by a newly-increased indication code stream information shows it is that code stream at source of media is operated, and uses the original GET_PARAMETER of RTSP, SET_PARAMETER, PLAY, REDIRECT method to wait and realize.
As mentioned above, source of media supports many code streams to realize by two kinds of methods.
First method is: prepare a plurality of single bit stream media files for same flow-medium performance, they respectively have different code streams.For example: rtsp: //example.com/2_1.avi, rtsp: //example.com/2_2.avi, rtsp: //example.com/2_3.avi, they are video files of same flow-medium performance, but their code stream is respectively 2M, 1M, 512K; The code stream scope (generally being a plurality of discrete code stream values) of each flow-medium performance correspondence of record in the streaming media server is in order to respond client query code stream scope.
Second method is: same flow-medium performance has only a media file, but has been to use many code streams compress technique, has a plurality of code streams.If have the single medium file of many code streams, server can be inquired about the code stream scope of obtaining media file at any time, the inquiry of reply client.
Specific code continuous query flow process comprises the steps: as shown in Figure 1
1, stream media receiving client terminal sends the code stream query messages to the RTSP server, the code stream scope of the flow-medium performance of inquiry program request, comprise in the message structure media file of GET_PARAMETER method, program request the global resource indications (Universal Resource Identifier, URI) and the Bitrate title.
If 2 RTSP servers are supported the Bitrate title, then return success message, carry the code stream scope, can be several hashed values, as 2M, 1M, 512K, or a continuous numerical value, as 200k-1.5M.
If 3 RTSP servers can return failed message because do not support the Bitrate title or the other reasons failure, and subsidiary Fail Type and failure cause.
Stream media receiving client terminal is shown to the user after obtaining the code stream scope of flow-medium performance of program request.The user can carry out respective handling according to above-mentioned processing method (1), (2), (3).If the user wishes to change transmission code stream according to current transmission quality, its idiographic flow such as Fig. 2, shown in Figure 3.
Fig. 2 revises the signaling process figure of code stream corresponding to being flow-medium performance when generating the media file of code stream more than, specifically comprises:
1, stream media receiving client terminal sends to the RTSP server and revises code flow message, can use the SET_PARAMETER method, also can use the PLAY method, carry the URI of the media file of program request, and the Range title that is used for representing the reproduction time scope (has been revised code stream midway if play, then indicate from the time point that interrupts and begin to play), and indicate the user with the Bitrate title and wish the code stream that uses.
If 2 RTSP servers are supported the Bitrate title, will return a success message (200OK), then in the time range of appointment with the code stream transport stream media data of user's appointment.
If 3 RTSP servers will return failed message because do not support Bitrate title or parameter area to make mistakes and can't carry out, and subsidiary Fail Type and failure cause.
Generate the situation of a plurality of single bit stream media files for same flow-medium performance, streaming media server will be determined the URI of correspondence code stream file according to the code stream of stream media receiving client terminal request, require stream media receiving client terminal to be redirected to corresponding URI then, concrete handling process comprises as shown in Figure 3:
1, stream media receiving client terminal sends to the RTSP server and revises code flow message, can use the SET_PARAMETER method, also can use the PLAY method, carry the URI of media file, and the Range title that is used for representing the reproduction time scope (has been revised code stream midway if play, then indicate from the time point that interrupts and begin to play), and wish the code stream that uses with the user that the Bitrate title indicates.
If 2 RTSP servers are supported the Bitrate title, will return a success message (200OK).
If 3 RTSP servers will return failed message because do not support Bitrate title or parameter area to make mistakes and can't carry out, and subsidiary Fail Type and failure cause.
4, the RTSP server is according to the code stream of client selection, select the URI of the media file of this code stream correspondence, attach behind the Location title, send redirect command to stream media receiving client terminal, require the Streaming Media client to turn to new URI to obtain suitable resource from old URI (URI of the media file of original bit stream correspondence).
5, with success message, the expression stream media receiving client terminal is about to carry out redirect action to stream media receiving client terminal to the RTSP server response.
6, stream media receiving client terminal sends request to the RTSP server, the session of request disconnection and old URI.
7, the RTSP server is responded success message to stream media receiving client terminal, and so far RTSP server and stream media receiving client terminal have disconnected the session of old URI, and has discharged related resource.
8, stream media receiving client terminal sends request to the RTSP server, the media description information of the new URI of acquisition request; Comprise the codec parameters of source of media in the media description information and transmit relevant parameter etc.
9, the RTSP server is responded run succeeded message and enclosed media descriptor to stream media receiving client terminal.
10, stream media receiving client terminal sends request according to media description information to the RTSP server, and request is set up and the session of URI newly.
11, the RTSP server is accepted the request of stream media receiving client terminal, responds success message, sets up new session, and distributes related resource.
12, stream media receiving client terminal sends playing request to the RTSP server, shows the time range (revised code stream midway if play, then indicate from the time point that interrupts begin broadcast) of broadcast with the Range title.
13, RTSP server response success message begins then to the client transmissions media stream data.
In sum, adopt the inventive method, streaming media server provides multiple code stream for same flow-medium performance in advance, when stream media receiving client terminal program request flow-medium performance, can initiate the code stream query requests to streaming media server, obtain the code stream scope of the flow-medium performance of program request; The user can select a suitable code stream according to the access bandwidth of place stream media receiving client terminal before broadcast, report streaming media server, is adopted the code stream playing stream media program of user's selection by streaming media server.Like this, the resource that does not need to take client and server is carried out the statistics of transmission quality (as packet loss), and simple realization is carried out the control that flow-medium performance is play quality by the user.
If because network condition changes, the flow-medium performance quality that causes playing changes, the user is request change transmission code stream in the playing programs process at any time, plays quality to guarantee better flow-medium performance.
Adopt the present invention,, can use resource reservation protocol (rsvp) to apply for bandwidth safeguard end to end according to the code stream scope if the user wants to guarantee video transmission quality end to end; If because access bandwidth is not enough, can be according to the code stream scope, to the suitable access bandwidth of Service Gateway application, to guarantee transmission quality.
The code stream scope of streaming media server of the present invention can be done very extensively, to adapt to variety of network conditions.
Adopt user of the present invention in time to adjust code stream, avoided the inaccurate and untimely shortcoming when adding up according to packet loss according to the sensory effects of audio/video flow.
According to said method of the present invention, the present invention provides corresponding streaming media server in addition, and its concrete structure comprises as shown in Figure 4:
The media file generation unit for same flow-medium performance generates the media file of code stream more than, or generates the media file of a plurality of single bit streams;
Code stream scope transmitting element is to the code stream scope of stream media receiving client terminal transmission flow-medium performance;
First code stream setting/modification performance element, receiving stream media receives the modification code flow message that client is initiated, and obtains the transmission code stream information that the stream media receiving client terminal user selects;
First-class media play unit, the transmission code stream according to the user selects starts the media file of corresponding code stream or adopts this code stream to play described flow-medium performance.
Also comprise:
The first code stream query unit, receiving stream media receives the code stream query requests that client is initiated, the code stream scope of the flow-medium performance of inquiry program request, and send to described code stream scope transmitting element.
The present invention also provides a kind of stream media receiving client terminal of correspondence, and its concrete structure comprises as shown in Figure 5:
Code stream scope receiving element, the code stream scope of the flow-medium performance that the receiving stream media server sends;
Second code stream setting/modification performance element, the transmission code stream according to the user selects sends the modification code flow message to streaming media server, carries the code stream information that the user selects;
The second streaming media playing unit receives the also flow-medium performance of display stream medium server broadcast.
Also comprise:
The second code stream query unit sends code stream query messages, the code stream scope of the flow-medium performance of acquisition request program request to streaming media server.
The present invention provides a kind of stream media play system in addition, and its concrete structure comprises streaming media server provided by the invention and stream media receiving client terminal as shown in Figure 6.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1, a kind of flow medium play control method is characterized in that, streaming media server provides multiple code stream for same flow-medium performance, and adopts real-time streaming protocol RTSP between described streaming media server and the stream media receiving client terminal, comprises the following steps:
A, stream media receiving client terminal send the code stream query messages to described streaming media server, carry the global resource identifiers, URIs of method GET_PARAMETER that RTSP provides, media file correspondence that request is play and the Bitrate title of indication code stream information;
Behind its support of described streaming media server judges Bitrate title, return success message, carry the code stream scope corresponding with described media file;
B, user select a kind of transmission code stream according to described code stream scope, report described streaming media server by described stream media receiving client terminal;
The transmission code stream that C, described streaming media server adopt the user to select is play described flow-medium performance.
2, the method for claim 1, it is characterized in that, among the described step B, any time of user before stream media receiving client terminal begins the playing stream media program or in playing process, select a kind of transmission code stream to report described streaming media server by described stream media receiving client terminal.
3, the method for claim 1 is characterized in that, also comprises among the described step B:
By the end-to-end bandwidth guarantee between RSVP application of described stream media receiving client terminal use RSVP and the described streaming media server.
4, the method for claim 1 is characterized in that, also comprises among the described step B:
Improve access bandwidth by described stream media receiving client terminal to the Service Gateway application.
5, the method for claim 1 is characterized in that, described streaming media server comprises for same flow-medium performance provides multiple code stream:
Described streaming media server is the media file that same flow-medium performance generates a plurality of single bit streams; Perhaps
Described streaming media server is the media file that same flow-medium performance generates code stream more than.
6, the method for claim 1 is characterized in that, when described streaming media server was the media file of same flow-medium performance generation code stream more than, described step B comprised:
B11, described stream media receiving client terminal send to described streaming media server and revise code flow message, carry method SET_PARAMETER that RTSP provides or PLAY, the URI of media file correspondence, the Range title and the Bitrate title of expression reproduction time scope, and indicate the code stream of stream media receiving client terminal user selection with the Bitrate title;
Behind B12, its support of the described streaming media server judges Bitrate title, return success message;
Described step C comprises:
Described streaming media server is in the time range of Range title appointment, and the code stream that the user who adopts the Bitrate title to indicate selects is play described flow-medium performance.
7, the method for claim 1 is characterized in that, when described streaming media server is a same flow-medium performance when generating the media file of a plurality of single bit streams, described step B comprises:
B21, described stream media receiving client terminal send to described streaming media server and revise code flow message, carry method SET_PARAMETER that RTSP provides or PLAY, the URI of current media file correspondence, the Range title and the Bitrate title of expression reproduction time scope, and indicate the code stream of stream media receiving client terminal user selection with the Bitrate title;
Behind B22, its support of the described streaming media server judges Bitrate title, the code stream according to the stream media receiving client terminal user selects matches the new URI corresponding with this code stream media file;
B23, new URI is attached behind the Location title that RTSP provides, send redirect command to described stream media receiving client terminal;
B24, described stream media receiving client terminal disconnect the session with current old URI, obtain the media description information of described new URI, and the session of foundation and described new URI;
Described step C comprises:
Described streaming media server is in the time range of Range title appointment, and the code stream that the user who adopts the Bitrate title to indicate selects is play described flow-medium performance.
8, as claim 1,6 or 7 described methods, it is characterized in that, when it does not support that the Bitrate title maybe can't be carried out when described streaming media server judges, return failed message, carry Fail Type and reason to described stream media receiving client terminal.
9, a kind of streaming media server is characterized in that, and adopts real-time streaming protocol RTSP between the stream media receiving client terminal, comprising:
The media file generation unit for same flow-medium performance generates the media file of code stream more than, or generates the media file of a plurality of single bit streams;
The first code stream query unit, receiving stream media receives client transmitted stream query requests, and described code stream query messages carries the global resource identifiers, URIs of method GET_PARAMETER that RTSP provides, media file correspondence that request is play and the Bitrate title of indication code stream information; After judging support Bitrate title, the code stream scope of the flow-medium performance of inquiry program request, and send to described code stream scope transmitting element;
Code stream scope transmitting element returns the success message that carries the code stream scope corresponding with described media file to stream media receiving client terminal;
First code stream setting/modification performance element, receiving stream media receives the modification code flow message that client is initiated, and obtains the transmission code stream information that the stream media receiving client terminal user selects;
First-class media play unit, the transmission code stream according to the user selects starts the media file of corresponding code stream or adopts this code stream to play described flow-medium performance.
10, a kind of stream media receiving client terminal is characterized in that, and adopts real-time streaming protocol RTSP between the streaming media server, comprising:
The second code stream query unit sends the code stream query messages to streaming media server, carries the global resource identifiers, URIs of method GET_PARAMETER that RTSP provides, media file correspondence that request is play and the Bitrate title of indication code stream information;
Code stream scope receiving element, the success message that carries the code stream scope corresponding that the receiving stream media server returns with described media file;
Second code stream setting/modification performance element, the transmission code stream according to the user selects sends the modification code flow message to streaming media server, carries the code stream information that the user selects;
The second streaming media playing unit receives the also flow-medium performance of display stream medium server broadcast.
11, a kind of stream media play system comprises streaming media server and stream media receiving client terminal, it is characterized in that, adopts real-time streaming protocol RTSP between described streaming media server and the described stream media receiving client terminal, and described streaming media server comprises:
The media file generation unit for same flow-medium performance generates the media file of code stream more than, or generates the media file of a plurality of single bit streams;
The first code stream query unit, receiving stream media receives client transmitted stream query requests, and described code stream query messages carries the global resource identifiers, URIs of method GET_PARAMETER that RTSP provides, media file correspondence that request is play and the Bitrate title of indication code stream information; After judging support Bitrate title, the code stream scope of the flow-medium performance of inquiry program request, and send to described code stream scope transmitting element;
Code stream scope transmitting element returns the success message that carries the code stream scope corresponding with described media file to stream media receiving client terminal;
First code stream setting/modification performance element, receiving stream media receives the modification code flow message that client is initiated, and obtains the transmission code stream information that the stream media receiving client terminal user selects;
First-class media play unit, the transmission code stream according to the user selects starts the media file of corresponding code stream or adopts this code stream to play described flow-medium performance;
Described stream media receiving client terminal comprises:
The second code stream query unit sends described code stream query messages to streaming media server, the code stream scope of the flow-medium performance of acquisition request program request;
The described success message that code stream scope receiving element, receiving stream media server return;
Second code stream setting/modification performance element, the transmission code stream according to the user selects sends the modification code flow message to streaming media server, carries the code stream information that the user selects;
The second streaming media playing unit receives the also flow-medium performance of display stream medium server broadcast.
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| CN200610078379A CN100583823C (en) | 2006-05-17 | 2006-05-17 | Method, device and system for controlling fluid medium broadcast |
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| CN200610078379A CN100583823C (en) | 2006-05-17 | 2006-05-17 | Method, device and system for controlling fluid medium broadcast |
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| CN1984056A CN1984056A (en) | 2007-06-20 |
| CN100583823C true CN100583823C (en) | 2010-01-20 |
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| EP3766226A4 (en) * | 2018-03-14 | 2021-12-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Service quality enhancement about consumption report-based mood switching |
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| 基于Web的交互式视频点播系统. 刘元超，李永全.网络通信. 2005 |
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