CN111083532B - Audio and video transmission control method and device of satellite system and server - Google Patents

Audio and video transmission control method and device of satellite system and server Download PDF

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Publication number
CN111083532B
CN111083532B CN201911369314.8A CN201911369314A CN111083532B CN 111083532 B CN111083532 B CN 111083532B CN 201911369314 A CN201911369314 A CN 201911369314A CN 111083532 B CN111083532 B CN 111083532B
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bandwidth
receiving
sending
receiving end
carrier
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CN111083532A (en
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张小龙
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Beijing Feixun Digital Technology Co ltd
Kyland Technology Co Ltd
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Beijing Feixun Digital Technology Co ltd
Kyland Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2385—Channel allocation; Bandwidth allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44209—Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44245—Monitoring the upstream path of the transmission network, e.g. its availability, bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6143—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a satellite
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6193—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via a satellite

Abstract

The embodiment of the invention discloses an audio and video transmission control method and device of a satellite system and a server. The method comprises the following steps: acquiring a sending end and at least one receiving end corresponding to the sending end, wherein the receiving end corresponds to the same or different sending carriers with the sending end; determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier; respectively calculating the sending bandwidth of the sending end aiming at each receiving end according to the total bandwidth of each sending carrier, the receiving bandwidth of each receiving end and the sending capacity of a modem in the satellite system; and indicating the sending end to send the audio and video data matched with the sending bandwidth to the corresponding receiving end through the satellite system under each sending carrier. The method can automatically adjust the definition of audio and video transmission according to the number of the transmitting ends and the receiving ends of the satellite system, and strictly controls the transmitting bandwidth of audio and video data not to exceed the transmitting capacity of the satellite modem.

Description

Audio and video transmission control method and device of satellite system and server
Technical Field
The embodiment of the invention relates to the technical field of video and audio transmission, in particular to an audio and video transmission control method, an audio and video transmission control device and a server of a satellite system.
Background
The satellite network is widely applied to remote video transmission in various industries due to the characteristics of wide coverage, long transmission distance, high transmission quality, high transmission rate and the like, and is used as an important supplement to the current ground communication network. The satellite network takes an artificial earth satellite as a communication relay node or a space node for executing a specific task and can be divided into a high elliptic orbit satellite, a geosynchronous orbit satellite, a medium orbit satellite and a low orbit satellite according to the orbit height; the method can be divided into a relay satellite and an application satellite according to functions.
Taking a geosynchronous orbit satellite as an example, the height of the orbit is 35786km, and the delay is generally about 300ms when the geosynchronous orbit satellite is used as a communication relay node to realize the propagation of a point-to-point network link between ground stations. Meanwhile, the channel gain of the network link is unstable, and the error rate is increased; the geosynchronous orbit satellite adopting the KA frequency band or the KU frequency band has longer time delay and higher error rate when being influenced by rainfall.
At present, frequency tracking, power margin compensation, forward error correction coding and other technologies are often adopted, but the above problems are still serious. In order to overcome the above problems, the existing video and audio transmission generally adopts a User Datagram Protocol (UDP) and a multicast mode for transmission. The real-time audio and video data transmission can be divided into two types, namely real-time audio and video transmission and non-real-time audio and video transmission according to the real-time property of the audio and video data.
Fig. 1 is a schematic diagram of a real-time video/audio transmission mode in the prior art, and as shown in fig. 1, the real-time video/audio transmission mode in the prior art generally adopts a multicast mode for transmission, which can reduce the occupation of a channel bandwidth of a receiving end. However, on one hand, in this mode, the channel bandwidth needs to be known before use, so that the coding rate at the video source end cannot exceed the bandwidth; on the other hand, the multicast mode is adopted, which is only suitable for unidirectional transmission and cannot realize bidirectional interactive transmission, and the video source, the receiving end and the network transmission equipment are required to support the multicast mode, so that the method has certain limitation. In addition, when the number of the receiving ends is increased, the coding rate of the video source needs to be manually reduced, so that the coding rate of the video source end cannot exceed the bandwidth. Therefore, the mode is only suitable for traditional applications such as remote video monitoring or broadcast television, and cannot meet the requirements of remote real-time bidirectional video conference or video and audio interaction.
In order to realize bidirectional interactive transmission, a streaming media forwarding mode can be adopted to replace a multicast mode. However, the real-time channel bandwidth of the satellite network and the transmitting capability of the satellite receiving device such as a satellite modem need to be accurately known, otherwise channel blockage or packet loss will be caused, and the video and audio are unsmooth. However, in the prior art, the coding rate of the video source needs to be manually reduced, so that the coding rate of the video source end cannot exceed the bandwidth; the audio and video data transmission capacity cannot be strictly controlled to exceed the transmission capacity of the satellite receiving device.
Fig. 2 is a schematic diagram of a non-real-time video/audio transmission mode in the prior art, as shown in fig. 2, this mode generally employs video files with multiple definitions recorded in advance, and during video/audio transmission, video files with different formats are called according to channel bandwidths. The method is only suitable for traditional video website propaganda or online video playing application, and cannot meet real-time bidirectional interactive transmission.
Disclosure of Invention
The embodiment of the invention provides an audio and video transmission control method, an audio and video transmission control device and a server of a satellite system, which can automatically adjust the definition of audio and video transmission and avoid packet loss.
In a first aspect, an embodiment of the present invention provides an audio and video transmission control method for a satellite system, where the method includes:
acquiring a sending end and at least one receiving end corresponding to the sending end, wherein the receiving end corresponds to the same or different sending carriers with the sending end;
determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier;
respectively calculating the sending bandwidth of the sending end aiming at each receiving end according to the total bandwidth of each sending carrier, the receiving bandwidth of each receiving end and the sending capacity of a modem in a satellite system;
and indicating the sending end to send audio and video data matched with the sending bandwidth to a corresponding receiving end through the satellite system under each sending carrier.
In a second aspect, an embodiment of the present invention further provides an apparatus for controlling audio/video transmission of a satellite system, where the apparatus includes:
the system comprises an acquisition module, a transmission module and a receiving module, wherein the acquisition module is used for acquiring a transmitting end and at least one receiving end corresponding to the transmitting end, and the receiving end corresponds to the same or different transmitting carriers with the transmitting end;
a receiving bandwidth determining module, configured to determine, according to a total bandwidth of each of the sending carriers and an occupation situation of each of the sending carriers, receiving bandwidths corresponding to each of the receiving ends, respectively;
a transmission bandwidth calculation module, configured to calculate, according to a total bandwidth of each transmission carrier, a reception bandwidth of each receiving end, and a transmission capability of a modem in a satellite system, a transmission bandwidth of the transmitting end for each receiving end;
and the transmitting indication module is used for indicating the transmitting end to transmit the audio and video data matched with the transmitting bandwidth to the corresponding receiving end through the satellite system under each transmitting carrier.
In a third aspect, an embodiment of the present invention further provides a server, where the server includes:
one or more processors;
a storage device for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors implement an audiovisual transmission control method of a satellite system according to any embodiment of the invention.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements an audio and video transmission control method for a satellite system according to any embodiment of the present invention.
The invention obtains a sending end and at least one receiving end corresponding to the sending end, wherein the receiving end corresponds to the same or different sending carriers with the sending end; determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier; respectively calculating the sending bandwidth of the sending end aiming at each receiving end according to the total bandwidth of each sending carrier, the receiving bandwidth of each receiving end and the sending capacity of a modem in the satellite system; the method and the device indicate a sending end to send audio and video data matched with sending bandwidth to a corresponding receiving end through a satellite system under each sending carrier, solve the problems that when bidirectional audio and video interaction is realized in the prior art, the coding code rate of a video source needs to be manually adjusted, the sending bandwidth of the audio and video data cannot be controlled to meet the sending capacity of a satellite system modem, and packet loss is caused, realize automatic adjustment of the definition of audio and video transmission according to the number of the sending end and the receiving end of the satellite system, strictly control the sending bandwidth of the audio and video data not to exceed the sending capacity of the satellite modem, and avoid the effect of packet loss.
Drawings
FIG. 1 is a schematic diagram of a prior art real-time audio-video transmission scheme;
FIG. 2 is a schematic diagram of a non-real-time audiovisual transmission mode of the prior art;
fig. 3 is a flowchart of an audio/video transmission control method of a satellite system according to an embodiment of the present invention;
fig. 4a is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention;
fig. 4b is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention;
fig. 4c is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention;
fig. 4d is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention;
fig. 4e is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention;
fig. 4f is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention;
fig. 4g is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention;
FIG. 5a is a diagram of a practical application provided by an embodiment of the present invention;
FIG. 5b is an organizational chart corresponding to a practical application chart provided by an embodiment of the invention;
fig. 6 is a schematic structural diagram of an audio/video transmission control apparatus of a satellite system according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a server according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 3 is a flowchart of an audio and video transmission control method for a satellite system according to an embodiment of the present invention, where this embodiment is applicable to a case where audio and video data are bidirectionally and interactively transmitted in a satellite system, and the method may be executed by an audio and video transmission control device for a satellite system, where the device may be implemented in a software and/or hardware manner, and the device may be integrated in a server, as shown in fig. 3, where the method specifically includes:
step 110, a transmitting end and at least one receiving end corresponding to the transmitting end are obtained, and the receiving end corresponds to the same or different transmitting carriers with the transmitting end.
In the satellite system, a transmitting end and a receiving end transmit audio and video data through a transmitting carrier, wherein the transmission of the transmitting end and the receiving end can be real-time and bidirectional interactive audio and video data transmission realized based on a streaming media forwarding technology. One sending end can send audio and video data to a plurality of receiving ends through one sending carrier wave, and can also send the audio and video data to different receiving ends through different sending carrier waves. The server can obtain the corresponding conditions of the sending end, the sending carrier and the receiving end according to the network interface in the satellite system, and can obtain the conditions of the sending end, the corresponding multiple receiving ends and the sending carrier used by the sending end and each receiving end.
And step 120, determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier.
The server can obtain the total bandwidth of each sending carrier and the occupation condition of each sending carrier according to a network interface in the satellite system. The server can determine the receiving bandwidth corresponding to the receiving end using the sending carrier according to the total bandwidth of the sending carrier and the occupation condition of the sending carrier.
In an implementation manner of the embodiment of the present invention, optionally, determining, according to the total bandwidth of each transmission carrier and the occupation situation of each transmission carrier, the receiving bandwidths respectively corresponding to each receiving end includes: if the target sending carrier corresponding to the currently processed target receiving end is the exclusive carrier, determining the total bandwidth of the target sending carrier as the receiving bandwidth corresponding to the target receiving end; and if the target transmitting carrier is the shared carrier, acquiring the transmitting carrier occupation condition of each transmitting and receiving channel corresponding to the target transmitting carrier, and determining the receiving bandwidth corresponding to the target receiving end according to the transmitting carrier occupation condition.
If the sending end only corresponds to one receiving end through the sending carrier, the receiving end can be determined as a target receiving end, the target sending carrier corresponding to the target receiving end is determined as an exclusive carrier, and the total bandwidth of the target sending carrier can be determined as the receiving bandwidth of the target receiving end. If the sending end corresponds to a plurality of receiving ends through the sending carrier wave, one currently processed receiving end in the plurality of receiving ends can be determined as a target receiving end, the target sending carrier wave corresponding to the target receiving end is determined as a shared carrier wave, and the server can acquire the occupation condition of the sending carrier wave of each receiving and sending channel existing in the target sending carrier wave and determine the receiving bandwidth corresponding to the target receiving end according to the occupation condition of the sending carrier wave. The transmitting and receiving channel can be a path of audio and video data transmission from a transmitting end to a receiving end by transmitting a carrier.
In an implementation manner of the embodiment of the present invention, optionally, determining, according to an occupation situation of a transmission carrier, a reception bandwidth corresponding to a target receiving end, includes: if the sending carrier wave occupied by each receiving and sending channel corresponding to the target sending carrier wave has residual bandwidth, determining the sum of the bandwidth of the sending carrier wave occupied by the target receiving end and the residual bandwidth as the receiving bandwidth corresponding to the target receiving end; and if the sending carrier occupied by each receiving and sending channel corresponding to the target sending carrier does not have residual bandwidth, determining the ratio of the difference value of the total bandwidth of the sending carrier and the preset reserved bandwidth to the total number of the receiving and sending channels corresponding to the target sending carrier as the receiving bandwidth corresponding to the target receiving end.
The example of how to determine the receiving bandwidth corresponding to a target receiving end according to the occupation situation of a transmitting carrier is described by taking the case that a transmitting end a, a transmitting end C and a transmitting end E respectively transmit audio and video data to a receiving end B, a receiving end D and a receiving end F through the same transmitting carrier, wherein the transmitting end a to the receiving end B, the transmitting end C to the receiving end D and the transmitting end E to the receiving end F respectively form a transmitting and receiving channel through the same transmitting carrier, and the total bandwidth of the transmitting carrier is 2 megabits per second (Mbps). In an actual application scene, a sending end A, a sending end C or a sending end E can send audio and video data to a plurality of receiving ends; correspondingly, the receiving end B, the receiving end D or the receiving end F can receive the audio and video data sent by the plurality of sending ends, and the sending ends and the corresponding receiving ends can bidirectionally and interactively transmit the audio and video data.
Fig. 4a is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention, as shown in fig. 4a, when there is no audio/video data transmission, an occupied condition of a transmitting carrier is 0Mbps, a residual bandwidth of 2Mbps exists, available bandwidths of each transceiving channel are 2Mbps, a sum of a bandwidth m of the transmitting carrier occupied by the target receiving end and the residual bandwidth n is 2Mbps, and a receiving bandwidth corresponding to the target receiving end is 2 Mbps.
Fig. 4B is a schematic diagram illustrating determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention, as shown in fig. 4B, when audio/video data transmission exists between a sending end a and a receiving end B, and the transmitted audio/video data occupies a bandwidth of 1Mbps, a sending carrier occupies 1Mbps between the sending end a and the receiving end B, and a remaining bandwidth of 1Mbps exists, an available bandwidth of a transceiving channel from the sending end a to the receiving end B is 1Mbps +1Mbps — 2Mbps, a bandwidth of a transceiving channel from the sending end C to the receiving end D, and an available bandwidth of a transceiving channel from the sending end E to the receiving end F is 0Mbps +1Mbps — 1 Mbps; and determining that the receiving bandwidth of the receiving end B is 2Mbps, and the receiving bandwidths of the receiving end D and the receiving end F are both 1 Mbps.
Fig. 4C is a schematic diagram illustrating determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention, as shown in fig. 4C, when a transmitting end C to a receiving end D also use a transmitting carrier to transmit 1Mbps audio/video data, at a certain moment, for a transmitting/receiving channel from the transmitting end a to the receiving end B, it is determined that the transmitting carrier occupies 1Mbps between the transmitting end a and the receiving end B, a remaining bandwidth of 0Mbps exists, and it is determined that an available bandwidth of the transmitting/receiving channel from the transmitting end a to the receiving end B is 1Mbps +0Mbps — 1 Mbps; for a transmitting-receiving channel from a transmitting end C to a receiving end D, determining that the transmitting carrier wave occupies 1Mbps and the receiving end D occupies 0Mbps of residual bandwidth, and determining that the available bandwidth of the transmitting-receiving channel from the transmitting end C to the receiving end D is 1Mbps +0 Mbps; for a transceiving channel from a sending end E to a receiving end F, determining that the sending carrier wave occupation condition is that the sending end A and the receiving end B occupy 1Mbps, the sending end C and the receiving end D occupy 1Mbps, the sending end E and the receiving end F occupy 0Mbps, and a residual bandwidth of 0Mbps exists, and determining that the available bandwidth of the transceiving channel from the sending end E to the receiving end F is 0Mbps +0 Mbps; and determining that the receiving bandwidths of the receiving end B and the receiving end D are both 1Mbps, and the receiving bandwidth of the receiving end F is both 0 Mbps.
Fig. 4D is a schematic diagram illustrating determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention, as shown in fig. 4D, when 2 paths of audio/video data transmission exist between a sending end a and a receiving end B, each path of audio/video data occupies a bandwidth of 0.5Mbps, a sending end C keeps transmitting 1Mbps of audio/video data to a receiving end D, and at some moment, it is determined that a sending carrier is completely occupied, and the sending carrier occupies 0.5Mbps +0.5Mbps between the sending end a and the receiving end B, 1Mbps between the sending end C and the receiving end D, and a remaining bandwidth of 0Mbps exists; the available bandwidth of a transceiving channel from a sending end A to a receiving end B is 0.5Mbps +0.5Mbps +0Mbps which is 1Mbps, the available bandwidth of a transceiving channel from a sending end C to a receiving end D is 1Mbps +0Mbps which is 1Mbps, and the available bandwidth of a transceiving channel from a sending end E to a receiving end F is 0Mbps +0Mbps which is 0 Mbps; and determining that the receiving bandwidths of the receiving end B and the receiving end D are both 1Mbps, and the receiving bandwidth of the receiving end F is 0 Mbps.
Fig. 4E is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention, as shown in fig. 4E, when a transmitting carrier is fully occupied as shown in fig. 4d, if the transmitting end E to the receiving end F needs to initiate audio/video data transmission, no bandwidth is available. In order to ensure that the transmitting end E to the receiving end F can perform audio and video data transmission, before initiating the audio and video data transmission, the server automatically allocates a preset reserved bandwidth, such as a 100 kilobit per second (Kbps), to the bandwidth in the transmitting carrier for the audio and video data transmission from the transmitting end E to the receiving end F. At this time, it may be determined that the common available bandwidth of the transceiving channels from the transmitting end a to the receiving end B is (2Mbps-100 Kbps) ÷ 3 × 2 ═ 1298Kbps, the available bandwidth of the transceiving channels from the transmitting end C to the receiving end D is (2Mbps-100 Kbps) ÷ 3 × 1 ═ 649Kbps, and the available bandwidth of the transceiving channels from the transmitting end E to the receiving end F is 100 Kbps. The receiving bandwidth of the receiving end B is 1298Kbps, the receiving bandwidth of the receiving end D is 649Kbps, and the receiving bandwidth of the receiving end F is 100 Kbps. It should be noted that, at this time, there are 4 transceiving channels at the transmitting carrier, 2 transceiving channels exist from the transmitting end a to the receiving end B, and respectively occupy a bandwidth of 649Kbps, 1 transceiving channel exists from the transmitting end C to the receiving end D, and occupies a bandwidth of 649Kbps, and 1 transceiving channel exists from the transmitting end E to the receiving end F, and occupies a bandwidth of 100 Kbps. In the calculation process of fig. 4e, it is a step in a dynamic process of determining the total bandwidth of the transmission carrier to be the receiving bandwidth corresponding to the target receiving end according to the ratio of the difference between the total bandwidth of the transmission carrier and the preset reserved bandwidth and the total number of the transceiving channels corresponding to the target transmission carrier, and the preset reserved bandwidth can be allocated to the transceiving channel newly established when there is no remaining bandwidth in the transmission carrier, and used for audio and video data transmission; and sharing the difference value between the total bandwidth of the transmission carrier and the preset reserved bandwidth as the rest existing transceiving channels, and calculating according to an average principle.
Fig. 4F is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention, and after all audio/video data is normally transmitted according to the bandwidth allocation of fig. 4E, because the audio/video data transmitted from the transmitting end E to the receiving end F occupies a very small bandwidth, the audio/video quality is very poor, and in order to improve the audio/video quality, the server may immediately readjust the bandwidth occupied by each path of the transceiving channel according to the total bandwidth and the number of paths of the transceiving channel. As shown in fig. 4f, the total bandwidth of the transmission carriers may be shared by all the transceiving channels, and the calculation may be performed according to an average principle. At this time, each path of transceiving channel occupies a bandwidth of 2Mbps ÷ 4 × 1 ═ 512Kbps, the transmitting end a and the receiving end B occupy a bandwidth of 512Kbps × 2 ═ 1024Kbps, and the transmitting end C, the receiving end D, and the transmitting end E to the receiving end F respectively occupy bandwidths of 512 Kbps; and determining that the receiving bandwidth of the receiving end B is 1024Kbps, and the receiving bandwidths of the receiving end D and the receiving end F are 512 Kbps. In the calculation process of fig. 4f, a dynamic process step of determining the total bandwidth of the transmission carrier to be the reception bandwidth corresponding to the target receiving end is also performed according to a difference between the total bandwidth of the transmission carrier and the preset reserved bandwidth and a ratio of the total number of the transceiving channels corresponding to the target transmission carrier, and the total bandwidth of the transmission carrier can be shared by the transceiving channels performing audio/video data transmission according to the preset reserved bandwidth and the other transceiving channels according to an average principle, so as to calculate the available bandwidth of each transceiving channel.
Fig. 4g is a schematic diagram of determining a receiving bandwidth corresponding to a target receiving end according to an embodiment of the present invention, and after all audio and video data are normally transmitted according to the bandwidth allocation of fig. 4f, if at this time, as shown in fig. 4g, the transmitting end a to the receiving end B close 1 path of transceiving channels, and the server readjusts the bandwidth occupied by each path of transceiving channel according to the total bandwidth and the number of paths of transceiving channels, so as to improve the audio and video quality of each path of transceiving channel. The preset reserved bandwidth, for example 100Kbps, can be used as a redundant reservation, the difference between the total bandwidth of the transmission carrier and the preset reserved bandwidth is sent, and all the transceiving channels for audio and video data transmission share the difference according to the average principle. At this time, the transmitting end a and the receiving end B, the transmitting end C and the receiving end D, and the transmitting end E to the receiving end F all occupy a bandwidth of (2Mbps-100 Kbps) ÷ 3 × 1 ═ 649 Kbps; and determining that the receiving bandwidths of the receiving end B, the receiving end D and the receiving end F are 649 Kbps. In the calculation process of fig. 4g, it is also a step in a dynamic process of determining the total bandwidth of the transmission carrier and the preset reserved bandwidth as the receiving bandwidth corresponding to the target receiving end according to the ratio of the difference between the total bandwidth of the transmission carrier and the preset reserved bandwidth and the total number of the transceiving channels corresponding to the target transmission carrier, and all the transceiving channels capable of performing audio and video data transmission are shared according to an average principle to transmit the difference between the total bandwidth of the transmission carrier and the preset reserved bandwidth.
Of course, the above calculation process is only an application example of calculating the receiving bandwidths corresponding to the receiving ends respectively in the embodiment of the present invention, and the embodiment of the present invention is not limited to the above calculation process, and may also be other calculation processes similar to the embodiment of the present invention, which are performed according to the principle of averaging and reserving. For example, during initialization, the server reserves a preset reserved bandwidth in advance, and other residual bandwidths are shared by each transceiving channel according to an average principle; or when the total number of the occupied bandwidths of the transceiving channels is smaller than the total bandwidth of the transmitting carrier, the server allows the transceiving channels to transmit audio and video data according to the requested bandwidth occupation condition, when the total number of the occupied bandwidths of the transceiving channels is larger than the total bandwidth of the transmitting carrier, the server reserves a preset reserved bandwidth, and other bandwidths are shared by the transceiving channels according to an average principle. The averaging principle may also be other calculation manners, such as each transceiver channel has a weight, and the calculation is performed according to the weight principle and the averaging principle.
And step 130, respectively calculating the sending bandwidth of the sending end aiming at each receiving end according to the total bandwidth of each sending carrier, the receiving bandwidth of each receiving end and the sending capacity of a modem in the satellite system.
The maximum data volume sent by the modem in the satellite system is agreed, and after the maximum data volume exceeds the maximum value range, the modem automatically discards the exceeding part to cause audio and video blockage, so that whether the sending bandwidth occupied by sending exceeds the sending capacity of the modem needs to be considered at a sending end during audio and video data transmission. The transmission bandwidth of the transmitting end for each receiving end may be calculated according to the limitation of the transmission capability of the first generation satellite receiving device commonly used at present.
In an implementation manner of the embodiment of the present invention, optionally, calculating the transmission bandwidth of the transmitting end for each receiving end according to the total bandwidth of each transmitting carrier, the receiving bandwidth of each receiving end, and the transmitting capability of the modem in the satellite system respectively includes: judging whether the calculated bandwidth corresponding to the receiving bandwidth of each receiving end meets the transmitting capacity of the modem or not according to a pre-transmitting capacity measurement formula and the total bandwidth of each transmitting carrier; if so, determining the current calculation bandwidth of each receiving end as the sending bandwidth of the sending end aiming at each receiving end; if not, after reducing each calculated bandwidth in equal proportion, returning to the operation of judging whether the calculated bandwidth corresponding to the receiving bandwidth of each receiving end meets the sending capability of the modem until the ending condition is met.
In an embodiment of the present invention, optionally, the determining whether the calculated bandwidth corresponding to the receiving bandwidth of each receiving end meets the sending capability of the modem according to a pre-sending capability measurement formula and the total bandwidth of each sending carrier includes: determining the calculation bandwidths respectively corresponding to the receiving bandwidths of the receiving ends, and acquiring corresponding ratios of the calculation bandwidths of the receiving ends to the total bandwidth of the sending carrier waves corresponding to the receiving ends; summing the corresponding ratios to obtain a ratio sum, and judging whether the ratio sum of the preset first ratio is less than or equal to 1; if yes, determining that the receiving bandwidth of each receiving end meets the sending capability of the modem; if not, determining that the receiving bandwidth of each receiving end does not meet the transmitting capacity of the modem.
In an implementation manner of the embodiment of the present invention, optionally, the determining the calculation bandwidths respectively corresponding to the receiving bandwidths of the receiving ends includes: acquiring the total bandwidth of a sending carrier corresponding to a receiving end; if the receiving bandwidth of the receiving end is less than or equal to the corresponding total bandwidth with the preset second proportion, determining the receiving bandwidth of the receiving end as the calculation bandwidth; and if the receiving bandwidth of the receiving end is greater than the corresponding total bandwidth with the preset second proportion, determining the total bandwidth with the preset second proportion as the calculated bandwidth.
In a specific example of the embodiment of the present invention, if one transmitting end only transmits audio and video data to one receiving end, for example, the transmitting end a only transmits audio and video data to the receiving end B. The server acquires the total bandwidth of the sending carrier corresponding to the receiving end B through the network interface, takes the total bandwidth of the second preset proportion as the default calculation bandwidth of the receiving end B, and selects the smaller value of the default calculation bandwidth of the receiving end B and the receiving bandwidth of the receiving end B as the calculation bandwidth corresponding to the receiving bandwidth of the receiving end B. The receiving bandwidth of the receiving end B may be the receiving bandwidth calculated according to the calculation process of step 120. The pre-sending capability measurement formula can be (the calculation bandwidth of the receiving end B ÷ (the total bandwidth × the preset first proportion)) ≦ 1, wherein each bandwidth unit is the same. Substituting the calculated bandwidth of the receiving end B into a pre-sending capacity measurement formula, if the formula is established, determining that the calculated bandwidth corresponding to the receiving bandwidth of the receiving end B meets the sending capacity of the modem, and determining that the sending bandwidth from the sending end A to the receiving end B is the calculated bandwidth of the receiving end B; if the formula is not satisfied, the calculated bandwidth corresponding to the receiving bandwidth of the receiving end B does not satisfy the sending capability of the modem, the calculated bandwidth of the receiving end B is reduced according to a certain proportion, the reduced calculated bandwidth of the receiving end B is substituted into the pre-sending capability measurement formula for judgment until the formula is satisfied, and the sending bandwidth from the sending end A to the receiving end B is determined to be the finally reduced calculated bandwidth of the receiving end B.
Exemplarily, the default calculation bandwidth of the receiving end B is fx ═ total bandwidth × 0.7 × 0.7, the receiving bandwidth of the receiving end B is fx1, if fx ≦ fx1, fx is selected to be substituted into the pre-transmission capability measurement formula, and if yes, it is determined whether (fx ÷ (total bandwidth × 0.7)) is less than or equal to 1; if fx > fx1, let fx equal fx1, bring fx into the formula for measuring pre-sending capability, and determine whether the formula holds. If the formula is established, the fx is used as the sending bandwidth from the sending end A to the receiving end B; if the formula is not established, making fx equal to fx multiplied by 0.9, bringing fx into a pre-sending capability measurement formula, and judging whether the formula is established or not; if not, continuing to make fx equal to fx multiplied by 0.9, bringing fx into a pre-sending capability measurement formula until the formula is established, and taking the final fx as the sending bandwidth from the sending end A to the receiving end B.
In another specific example of the embodiment of the present invention, if one transmitting end transmits audio and video data to two receiving ends, for example, the transmitting end a transmits the audio and video data to the receiving end B and the receiving end C. And the server acquires the total bandwidth of the sending carrier wave corresponding to the receiving end B and the receiving end C respectively through the network interface, and takes the corresponding total bandwidth with the second preset proportion as the default calculation bandwidth of the receiving end B and the receiving end C respectively. Selecting the smaller value of the default calculation bandwidth of the receiving end B and the receiving bandwidth of the receiving end B as the calculation bandwidth corresponding to the receiving bandwidth of the receiving end B; and selecting the smaller value of the default calculation bandwidth of the receiving end C and the receiving bandwidth of the receiving end C as the calculation bandwidth corresponding to the receiving bandwidth of the receiving end C. The receiving bandwidths of the receiving end B and the receiving end C may be the receiving bandwidths calculated according to the calculation process of step 120. The pre-sending capability measurement formula may be (the calculated bandwidth of the receiving end B ÷ (the total bandwidth corresponding to the receiving end B × the preset first proportion) + the calculated bandwidth of the receiving end C ÷ (the total bandwidth corresponding to the receiving end C × the preset first proportion))) less than or equal to 1, where each bandwidth unit is the same. Substituting the calculated bandwidths of the receiving end B and the receiving end C into a pre-sending capacity measurement formula, if the formula is established, determining that the calculated bandwidths corresponding to the receiving bandwidths of the receiving end B and the receiving end C meet the sending capacity of the modem, determining that the sending bandwidth from the sending end A to the receiving end B is the calculated bandwidth of the receiving end B, and determining that the sending bandwidth from the sending end A to the receiving end C is the calculated bandwidth of the receiving end C; if the formula is not satisfied, the calculation bandwidths corresponding to the receiving bandwidths of the receiving ends B and C do not satisfy the sending capability of the modem, the calculation bandwidths of the receiving ends B and C are reduced according to a certain proportion, the reduced calculation bandwidths of the receiving ends B and C are substituted into a pre-sending capability measurement formula for judgment until the formula is satisfied, the sending bandwidths from the sending end A to the receiving end B are determined to be the final reduced calculation bandwidth of the receiving end B, and the sending bandwidths from the sending end A to the receiving end C are determined to be the final reduced calculation bandwidth of the receiving end C.
Illustratively, the default calculation bandwidth of the receiving end B is fxa, which is equal to the total bandwidth × 0.7 × 0.7 corresponding to the receiving end B, the receiving bandwidth of the receiving end B is fx1, and if fxa is less than or equal to fx1, fxa is selected to be substituted into the pre-sending capability measurement formula; the default calculation bandwidth of the receiving end C is fxb ═ total bandwidth × 0.7 × 0.7 corresponding to the receiving end C, the receiving bandwidth of the receiving end C is fx2, if fxb is not more than fx2, fxb is selected and is brought into the pre-sending capability measurement formula, and if yes, it is judged whether (fxa ÷ (total bandwidth × 0.7 corresponding to the receiving end B) + fxb ÷ (total bandwidth × 0.7 corresponding to the receiving end C)) is less than or equal to 1; if fxa > fx1, making fxa equal to fx1, bringing fxa into a pre-sending capability measurement formula, and judging whether the formula is established, if fxb > fx1, making fxb equal to fx1, and bringing fxb into the pre-sending capability measurement formula, and judging whether the formula is established. If the formula is established, using fxa as the transmission bandwidth from the transmitting end A to the receiving end B, and using fxb as the transmission bandwidth from the transmitting end A to the receiving end C; if the formula is not established, simultaneously enabling fxa to be equal to fxa multiplied by 0.9, enabling fxb to be equal to fxb multiplied by 0.9, bringing fxa and fxb into the pre-sending capacity measurement formula, and judging whether the formula is established; if the result is not true, continuing to make fxa equal to fxa × 0.9, fxb equal to fxb × 0.9, substituting fxa and fxb into the pre-sending capability measurement formula until the formula is true, taking the final fxa as the sending bandwidth from the sending end A to the receiving end B, and taking the final fxb as the sending bandwidth from the sending end A to the receiving end C. When one transmitting end transmits audio and video data to more receiving ends, similar calculation can be performed according to the above specific example, and the transmission bandwidth of the transmitting end for each receiving end is calculated.
And 140, indicating the transmitting end to transmit the audio and video data matched with the transmission bandwidth to the corresponding receiving end through the satellite system under each transmission carrier.
The server can send the sending bandwidth of the sending end aiming at each receiving end to the sending end, instruct the sending end to automatically adjust the video coding code rate according to the sending bandwidth, send the audio and video data matched with the sending bandwidth to the corresponding receiving end through the satellite system, and automatically adjust the sending capacity and definition of the transmitted audio and video.
The invention obtains a sending end and at least one receiving end corresponding to the sending end, wherein the receiving end corresponds to the same or different sending carriers with the sending end; determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier; respectively calculating the sending bandwidth of the sending end aiming at each receiving end according to the total bandwidth of each sending carrier, the receiving bandwidth of each receiving end and the sending capacity of a modem in the satellite system; the method and the device indicate a sending end to send audio and video data matched with sending bandwidth to a corresponding receiving end through a satellite system under each sending carrier, solve the problems that when bidirectional audio and video interaction is realized in the prior art, the coding code rate of a video source needs to be manually adjusted, the sending bandwidth of the audio and video data cannot be controlled to meet the sending capacity of a satellite system modem, and packet loss is caused, realize automatic adjustment of the definition of audio and video transmission according to the number of the sending end and the receiving end of the satellite system, strictly control the sending bandwidth of the audio and video data not to exceed the sending capacity of the satellite modem, and avoid the effect of packet loss.
Fig. 5a is a diagram of an actual application provided in the embodiment of the present invention, and fig. 5b is an organizational structure diagram corresponding to the diagram of the actual application provided in the embodiment of the present invention. As shown in fig. 5a, in practical application, a practical application process of the embodiment of the present invention may be that 1 top-level unit, 2 second-level units, and 4 third-level units perform remote video conference communication under a satellite system (an arrow direction in fig. 5a represents a transmission direction of audio and video data), and an organization structure of the practical application process may be as shown in fig. 5 b.
As shown in fig. 5a, the usage state of the satellite system is: 1) the total bandwidth of the No. 1 sending carrier is 2Mbps and is a shared carrier, the top unit and the secondary unit A receive and send audio and video data through the No. 1 sending carrier, and the top unit receives the audio and video data sent by the secondary unit B through the No. 1 sending carrier (in a satellite system, one sending carrier can be used for receiving data and sending data, and can also be used for receiving or sending data only); 2) the total bandwidth of the No. 3 sending carrier is 1.5Mbps and is an exclusive carrier, and the secondary unit B receives the audio and video data sent by the top unit through the No. 3 sending carrier; 3) the total bandwidth of the No. 2 sending carrier is 2Mbps and is a shared carrier, and the second-level unit A and the second-level unit B receive audio and video data sent by all the third-level units through the No. 2 sending carrier; 4) the total bandwidth of the No. 4 sending carrier is 2Mbps, the carrier is shared, and all the three-level units receive the audio and video data sent by all the two-level units through the No. 4 sending carrier.
By taking the local initial video coding parameters set in all units as 1080P and 1Mbps as an example, according to the audio and video transmission control method of the satellite system provided by the embodiment of the invention, when only the top level unit and the secondary level unit B are interacted, and when two sides transmit audio and video data with the transmission bandwidth of 1Mbps, the transmission capacity of the modem can be met, so that the two sides can acquire 1080P audio and video, but when the secondary level unit A is also added into a conference, and a transmitting end transmits the audio and video data with the transmission bandwidth of 1Mbps, the transmission capacity of the modem cannot be met, so that the transmission bandwidth can be reduced, the video coding rate can be automatically adjusted, and the three sides can acquire 720P audio and video. When the second-level unit A and the second-level unit B carry all the third-level units to participate in a conference, the No. 2 carrier and the No. 4 carrier are shared, and a sending end cannot meet the sending capability of a modem when audio and video data are transmitted at the sending bandwidth of 1Mbps, so that the sending bandwidth can be reduced, the video coding rate can be automatically adjusted, and all the units can obtain 720P audio and video. If the third-level unit C and the third-level unit E quit the conference and the audio and video data transmission is closed, the transmitting capacity of the modem can be met when the transmitting end transmits the audio and video data at the transmitting bandwidth of 1Mbps, and the audio and video acquired by the second-level unit A and the second-level unit B can be automatically changed into 1080P.
The audio and video transmission control method of the satellite system provided by the embodiment of the invention can be used together with a streaming media forwarding technology, a layered coding technology, a layered forwarding technology and a forward error correction technology, can ensure the fluency of real-time bidirectional audio and video data interaction among a plurality of devices under the satellite system, and ensures that the network is smooth without the phenomenon of packet loss, image or sound blockage and the like. In practical application, by adopting the audio and video transmission control method of the satellite system provided by the embodiment of the invention, in an audio and video conference based on streaming media forwarding processing, audio and video data can be transmitted smoothly in real time, and a transmitting end can automatically change the audio and video quality according to the path number change of the audio and video data transmission in a network.
Example two
Fig. 6 is a schematic structural diagram of an audio/video transmission control device of a satellite system according to a second embodiment of the present invention. With reference to fig. 6, the apparatus comprises: an obtaining module 210, a receiving bandwidth determining module 220, a sending bandwidth calculating module 230 and a sending indicating module 240.
An obtaining module 210, configured to obtain a sending end and at least one receiving end corresponding to the sending end, where the receiving end corresponds to the same or different sending carriers with the sending end;
a receiving bandwidth determining module 220, configured to determine, according to the total bandwidth of each transmitting carrier and the occupation situation of each transmitting carrier, receiving bandwidths corresponding to each receiving end;
a transmission bandwidth calculating module 230, configured to calculate, according to the total bandwidth of each transmission carrier, the receiving bandwidth of each receiving end, and the transmission capability of the modem in the satellite system, the transmission bandwidth of the transmitting end for each receiving end;
and a sending indication module 240, configured to indicate the sending end to send, through the satellite system, the audio and video data matched with the sending bandwidth to the corresponding receiving end under each sending carrier.
The audio and video transmission control device of the satellite system provided by the embodiment of the invention can execute the audio and video transmission control method of the satellite system provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
On the basis of the foregoing embodiment, optionally, the receiving bandwidth determining module 220 includes:
a first receiving bandwidth determining unit, configured to determine, if a target sending carrier corresponding to a currently processed target receiving end is an exclusive carrier, a total bandwidth of the target sending carrier as a receiving bandwidth corresponding to the target receiving end;
and the second receiving bandwidth determining unit is used for acquiring the occupation situation of the transmitting carrier of each transmitting and receiving channel corresponding to the target transmitting carrier if the target transmitting carrier is the shared carrier, and determining the receiving bandwidth corresponding to the target receiving end according to the occupation situation of the transmitting carrier.
On the basis of the foregoing embodiment, optionally, the second determining unit for receiving bandwidth includes:
a receiving bandwidth first determining subunit, configured to determine, if there is a remaining bandwidth in a transmitting carrier occupied by each transceiving channel corresponding to a target transmitting carrier, a sum of a bandwidth of the transmitting carrier occupied by a target receiving end and the remaining bandwidth as a receiving bandwidth corresponding to the target receiving end;
and the second receiving bandwidth determining subunit is configured to determine, if there is no remaining bandwidth in the sending carrier occupied by each transceiving channel corresponding to the target sending carrier, a ratio of a difference between a total bandwidth of the sending carrier and a preset reserved bandwidth to a total number of transceiving channels corresponding to the target sending carrier as a receiving bandwidth corresponding to the target receiving end.
On the basis of the foregoing embodiment, optionally, the transmission bandwidth calculating module 230 includes:
a sending capability judging unit, configured to judge whether a calculated bandwidth corresponding to a receiving bandwidth of each receiving end satisfies a sending capability of the modem according to the pre-sending capability measurement formula and a total bandwidth of each sending carrier;
a sending bandwidth determining unit, configured to determine, if the current corresponding calculated bandwidth of each receiving end is the sending bandwidth of each receiving end, as the sending bandwidth of the sending end for each receiving end; if not, after reducing each calculated bandwidth in equal proportion, returning to the operation of judging whether the calculated bandwidth corresponding to the receiving bandwidth of each receiving end meets the sending capability of the modem until the ending condition is met.
On the basis of the foregoing embodiment, optionally, the sending capability determining unit includes:
a calculation bandwidth determining subunit, configured to determine calculation bandwidths corresponding to the reception bandwidths of the respective receiving ends, and obtain respective corresponding ratios of the calculation bandwidths of the respective receiving ends to a total bandwidth of the transmission carriers corresponding to the respective receiving ends;
the judging subunit is used for summing the corresponding ratios to obtain a ratio sum and judging whether the ratio sum of the preset first ratio is less than or equal to 1; if yes, determining that the receiving bandwidth of each receiving end meets the sending capability of the modem; if not, determining that the receiving bandwidth of each receiving end does not meet the transmitting capacity of the modem.
On the basis of the foregoing embodiment, optionally, the bandwidth determination subunit is calculated, and is specifically configured to obtain a total bandwidth of transmission carriers corresponding to the receiving end; if the receiving bandwidth of the receiving end is less than or equal to the corresponding total bandwidth with the preset second proportion, determining the receiving bandwidth of the receiving end as the calculation bandwidth; and if the receiving bandwidth of the receiving end is greater than the corresponding total bandwidth with the preset second proportion, determining the total bandwidth with the preset second proportion as the calculated bandwidth.
EXAMPLE III
Fig. 7 is a schematic structural diagram of a server according to a third embodiment of the present invention, and as shown in fig. 7, the server includes:
one or more processors 410, one processor 410 being exemplified in FIG. 7;
a memory 420;
the apparatus may further include: an input device 430 and an output device 440.
The processor 410, the memory 420, the input device 430 and the output device 440 of the apparatus may be connected by a bus or other means, for example, in fig. 7.
The memory 420 is a non-transitory computer-readable storage medium, and can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to an audio/video transmission control method of a satellite system in an embodiment of the present invention (for example, the obtaining module 210, the receiving bandwidth determining module 220, the sending bandwidth calculating module 230, and the sending indication module 240 shown in fig. 6). The processor 410 executes various functional applications and data processing of the computer device by running the software programs, instructions and modules stored in the memory 420, that is, implementing the audio/video transmission control method of the satellite system of the above method embodiment, that is:
acquiring a sending end and at least one receiving end corresponding to the sending end, wherein the receiving end corresponds to the same or different sending carriers with the sending end;
determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier;
respectively calculating the sending bandwidth of the sending end aiming at each receiving end according to the total bandwidth of each sending carrier, the receiving bandwidth of each receiving end and the sending capacity of a modem in a satellite system;
and indicating the sending end to send audio and video data matched with the sending bandwidth to a corresponding receiving end through the satellite system under each sending carrier.
The memory 420 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the computer device, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 420 may optionally include memory located remotely from processor 410, which may be connected to the terminal device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the computer apparatus. The output device 440 may include a display device such as a display screen.
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements an audio and video transmission control method for a satellite system, according to an embodiment of the present invention:
acquiring a sending end and at least one receiving end corresponding to the sending end, wherein the receiving end corresponds to the same or different sending carriers with the sending end;
determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier;
respectively calculating the sending bandwidth of the sending end aiming at each receiving end according to the total bandwidth of each sending carrier, the receiving bandwidth of each receiving end and the sending capacity of a modem in a satellite system;
and indicating the sending end to send audio and video data matched with the sending bandwidth to a corresponding receiving end through the satellite system under each sending carrier.
Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (6)

1. An audio and video transmission control method of a satellite system is characterized by comprising the following steps:
acquiring a sending end and at least one receiving end corresponding to the sending end, wherein the receiving end corresponds to the same or different sending carriers with the sending end;
determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier;
respectively calculating the sending bandwidth of the sending end aiming at each receiving end according to the total bandwidth of each sending carrier, the receiving bandwidth of each receiving end and the sending capacity of a modem in a satellite system;
indicating the sending end to send audio and video data matched with the sending bandwidth to a corresponding receiving end through the satellite system under each sending carrier;
determining receiving bandwidths respectively corresponding to the receiving ends according to the total bandwidth of each transmitting carrier and the occupation condition of each transmitting carrier, wherein the determining comprises the following steps:
if the target sending carrier corresponding to the currently processed target receiving end is an exclusive carrier, determining the total bandwidth of the target sending carrier as the receiving bandwidth corresponding to the target receiving end;
if the target transmitting carrier is a shared carrier, acquiring the transmitting carrier occupation condition of each transmitting-receiving channel corresponding to the target transmitting carrier, and determining the receiving bandwidth corresponding to the target receiving end according to the transmitting carrier occupation condition;
determining a receiving bandwidth corresponding to the target receiving end according to the occupation condition of the transmitting carrier, including:
if the sending carrier wave occupied by each receiving and sending channel corresponding to the target sending carrier wave has residual bandwidth, determining the sum of the bandwidth of the sending carrier wave occupied by the target receiving end and the residual bandwidth as the receiving bandwidth corresponding to the target receiving end;
if the sending carrier wave occupied by each receiving and sending channel corresponding to the target sending carrier wave has no residual bandwidth, determining the ratio of the difference value of the total bandwidth of the sending carrier wave and the preset reserved bandwidth and the total number of the receiving and sending channels corresponding to the target sending carrier wave as the receiving bandwidth corresponding to the target receiving end;
calculating the transmission bandwidth of the transmitting end aiming at each receiving end according to the total bandwidth of each transmitting carrier, the receiving bandwidth of each receiving end and the transmitting capacity of a modem in a satellite system, respectively, and comprising the following steps:
judging whether the calculated bandwidth corresponding to the receiving bandwidth of each receiving end meets the transmitting capacity of the modem or not according to a pre-transmitting capacity measurement formula and the total bandwidth of each transmitting carrier;
if so, determining the current corresponding calculation bandwidth of each receiving end as the sending bandwidth of the sending end aiming at each receiving end;
if not, after reducing the calculated bandwidths in equal proportion, returning to the operation of judging whether the calculated bandwidths corresponding to the receiving bandwidths of the receiving ends meet the sending capability of the modem or not until the ending condition is met.
2. The method of claim 1, wherein the determining whether the receiving bandwidth of each receiving end satisfies the transmitting capability of the modem according to a pre-transmitting capability measurement formula and the total bandwidth of each transmitting carrier comprises:
determining the calculated bandwidths respectively corresponding to the receiving bandwidths of the receiving ends, and acquiring corresponding ratios of the calculated bandwidths of the receiving ends to the total bandwidth of the sending carrier corresponding to the receiving ends;
summing the corresponding ratios to obtain a ratio sum, and judging whether the ratio sum of a preset first ratio is less than or equal to 1;
if yes, determining that the receiving bandwidth of each receiving end meets the sending capability of the modem;
if not, determining that the receiving bandwidth of each receiving end does not meet the sending capability of the modem.
3. The method of claim 2, wherein determining the calculated bandwidths corresponding to the receiving bandwidths of the receiving ends respectively comprises:
acquiring the total bandwidth of the sending carrier corresponding to the receiving end;
if the receiving bandwidth of the receiving end is less than or equal to the total bandwidth of the corresponding preset second proportion, determining the receiving bandwidth of the receiving end as the calculated bandwidth;
and if the receiving bandwidth of the receiving end is greater than the total bandwidth of the corresponding preset second proportion, determining the total bandwidth of the preset second proportion as the calculated bandwidth.
4. An audio/video transmission control apparatus for a satellite system, comprising:
the system comprises an acquisition module, a transmission module and a receiving module, wherein the acquisition module is used for acquiring a transmitting end and at least one receiving end corresponding to the transmitting end, and the receiving end corresponds to the same or different transmitting carriers with the transmitting end;
a receiving bandwidth determining module, configured to determine, according to a total bandwidth of each of the sending carriers and an occupation situation of each of the sending carriers, receiving bandwidths corresponding to each of the receiving ends, respectively;
a transmission bandwidth calculation module, configured to calculate, according to a total bandwidth of each transmission carrier, a reception bandwidth of each receiving end, and a transmission capability of a modem in a satellite system, a transmission bandwidth of the transmitting end for each receiving end;
the transmitting indication module is used for indicating the transmitting end to transmit audio and video data matched with the transmitting bandwidth to the corresponding receiving end through the satellite system under each transmitting carrier;
the receiving bandwidth determining module includes:
a first receiving bandwidth determining unit, configured to determine, if a target sending carrier corresponding to a currently processed target receiving end is an exclusive carrier, a total bandwidth of the target sending carrier as a receiving bandwidth corresponding to the target receiving end;
a second receiving bandwidth determining unit, configured to, if the target sending carrier is a shared carrier, obtain a sending carrier occupation situation of each transceiving channel corresponding to the target sending carrier, and determine a receiving bandwidth corresponding to the target receiving end according to the sending carrier occupation situation;
determining a receiving bandwidth corresponding to the target receiving end according to the occupation condition of the transmitting carrier, including:
if the sending carrier wave occupied by each receiving and sending channel corresponding to the target sending carrier wave has residual bandwidth, determining the sum of the bandwidth of the sending carrier wave occupied by the target receiving end and the residual bandwidth as the receiving bandwidth corresponding to the target receiving end;
if the sending carrier wave occupied by each receiving and sending channel corresponding to the target sending carrier wave has no residual bandwidth, determining the ratio of the difference value of the total bandwidth of the sending carrier wave and the preset reserved bandwidth and the total number of the receiving and sending channels corresponding to the target sending carrier wave as the receiving bandwidth corresponding to the target receiving end;
calculating the transmission bandwidth of the transmitting end aiming at each receiving end according to the total bandwidth of each transmitting carrier, the receiving bandwidth of each receiving end and the transmitting capacity of a modem in a satellite system, respectively, and comprising the following steps:
judging whether the calculated bandwidth corresponding to the receiving bandwidth of each receiving end meets the transmitting capacity of the modem or not according to a pre-transmitting capacity measurement formula and the total bandwidth of each transmitting carrier;
if so, determining the current corresponding calculation bandwidth of each receiving end as the sending bandwidth of the sending end aiming at each receiving end;
if not, after reducing the calculated bandwidths in equal proportion, returning to the operation of judging whether the calculated bandwidths corresponding to the receiving bandwidths of the receiving ends meet the sending capability of the modem or not until the ending condition is met.
5. A server, comprising:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the method of audiovisual transmission control for a satellite system as claimed in any of claims 1-3.
6. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method for controlling audio-video transmission of a satellite system according to any one of claims 1 to 3.
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