CN116320612B - Video data transmission system - Google Patents

Video data transmission system Download PDF

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Publication number
CN116320612B
CN116320612B CN202310565044.8A CN202310565044A CN116320612B CN 116320612 B CN116320612 B CN 116320612B CN 202310565044 A CN202310565044 A CN 202310565044A CN 116320612 B CN116320612 B CN 116320612B
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video data
video
cache area
preset
list
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CN116320612A (en
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李昌晋
曹喜信
曹昕妍
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Peking University
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Peking University
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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]
    • H04N21/40—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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention provides a video data transmission system, comprising: the video data acquisition system comprises a plurality of video data acquisition terminals, a video data receiving terminal, a processor and a memory storing a computer program, wherein when the computer program is executed by the processor, the following steps are realized: acquiring an initial video data list; preprocessing an initial video data list to obtain a first intermediate video data list; acquiring a preset video cache area ID list according to the first intermediate video data list, sending the first intermediate video data list to a video cache area corresponding to the preset video cache area ID list, comparing the target packet loss rate with a first packet loss rate threshold value and a second packet loss rate threshold value, determining the storage capacity of the video cache area, and sending video data corresponding to the storage capacity of the video cache area to a video data receiving end; the invention can dynamically adjust the size of the video data buffer area by the size of the packet loss rate, thereby avoiding the congestion of the data transmission channel.

Description

Video data transmission system
Technical Field
The invention relates to the technical field of data transmission, in particular to a video data transmission system.
Background
Typically, the connection between the client device and the server system requires the addition of a transfer buffer to transfer data. For example, transmission Control Protocol (TCP) may use a transmit buffer and a receive buffer in the operating system kernel of each connected device. Such improper sizing of the transmission buffer may lead to various problems including latency issues, memory pressure. For example, in the case where the transmission buffer is too small, excessive handshaking between the server and the client device may cause delay problems, preventing the connection from maintaining the desired data transfer rate. Also, in the event that the transmission buffer is too large, particularly for client-server systems involving thousands or millions of connections, the memory requirements for maintaining the buffer may become excessive. There is a need for systems and methods that facilitate properly sizing a transmission buffer for a connection between a server system and a client.
Currently, in the prior art, respective bandwidth requirements are available for each of a plurality of network connections between at least one server and at least one client device; a respective delay for each network connection may be determined; the expected transmission buffer size for each network connection may be calculated based on the respective bandwidth requirements and the respective delays for that network connection; a new transport buffer size for each network connection may be set to the desired transport buffer size for that network connection; and may use the new transmission buffer size to transmit data from the at least one server to the at least one client device.
In summary, the method for determining the transmission buffer has the following problems: for a large amount of transmission data, the existing method has poor effect of dynamically adjusting the size of a transmission buffer zone, so that the data cannot be transmitted in time during transmission, and further, the data transmission channel is jammed.
Disclosure of Invention
Aiming at the technical problems, the invention adopts the following technical scheme: a video data transmission system, the system comprising: the system comprises a plurality of video data acquisition terminals, a video data receiving terminal, a processor and a memory storing a computer program, wherein the video data receiving terminal is in communication connection with each video data acquisition terminal, and when the computer program is executed by the processor, the following steps are realized:
s100, acquiring an initial video data list A= { A 1 ，……，A i ，……，A m (wherein A) i For the initial video data corresponding to the ith video data acquisition end, i= … … m, and m is the number of video data acquisition ends.
S200, preprocessing the A to obtain a first intermediate video data list A corresponding to the A 0 ={A 0 1 ，……，A 0 i ，……，A 0 m }，A 0 i Is A i Corresponding first intermediate video data.
S300, obtaining A 0 Corresponding preset video cache region ID list b= { B 1 ，……，B i ，……，B m And will A 0 i Send to B i B in the corresponding preset video buffer area i Is A 0 i Corresponding toWherein, in step S300, B is also determined by the following steps i Data storage amount of corresponding preset video cache area:
s301, obtaining A at the current time point 0 Corresponding packet loss rate eta 0 。
S302, when eta 0 ≤η 0 1 At the time, A is obtained 0 i Data storage amount of corresponding first cache area and will be A 0 i Data storage of the corresponding first cache area is used as B i Data storage capacity of corresponding preset video cache area, wherein eta 0 1 And the first packet loss rate threshold value is preset.
S303, when eta 0 1 ＜η 0 ≤η 0 2 At the time, A is obtained 0 i Data storage amount of corresponding second cache area and will be A 0 i Data storage of the corresponding second cache area is used as B i Data storage capacity of corresponding preset video cache area, wherein eta 0 2 And the second packet loss rate threshold value is preset.
S304, when eta 0 ＞η 0 2 At the time, A is obtained 0 i Data storage amount of corresponding third cache area and will be A 0 i Data storage of the corresponding third cache area as B i And the data storage amount of the corresponding preset video cache area.
S400, obtaining a second intermediate video data list B from B 0 ={B 0 1 ，……，B 0 i ，……，B 0 m }，B 0 i Is B i And the corresponding second intermediate video data is the first intermediate video data stored in a preset video cache area corresponding to any preset video cache area ID.
S500, B 0 And sending the target video data to the video data receiving end so that the video data receiving end can acquire the target video data.
The present invention provides a video data transmission system, the system comprising: the system comprises a plurality of video data acquisition terminals, a video data receiving terminal, a processor and a memory storing a computer program, wherein the video data receiving terminal is in communication connection with each video data acquisition terminal, and when the computer program is executed by the processor, the following steps are realized: acquiring an initial video data list; preprocessing an initial video data list to obtain a first intermediate video data list; according to the first intermediate video data list, a preset video cache area ID list is obtained, the first intermediate video data list is sent to a video cache area corresponding to the preset video cache area ID list, the storage capacity is determined based on comparison of the target packet loss rate with a first packet loss rate threshold value and a second packet loss rate threshold value, and video data in the preset video cache area corresponding to the storage capacity is sent to the video data receiving end; it can be known that the size of the transmission buffer area can be dynamically adjusted by the size of the packet loss rate, so that the congestion of the data transmission channel can be avoided.
The foregoing description is only an overview of the present invention, and it is to be understood that the present invention may be embodied in the form of specific details, for the purpose of providing a more thorough understanding of the present invention, and for the purpose of providing a more complete understanding of the present invention, as well as the above-described and other objects, features and advantages of the present invention, and is described in detail below with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a video data transmission system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention based on the embodiments of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the present embodiment provides a video data transmission system, which includes: the system comprises a plurality of video data acquisition terminals, a video data receiving terminal, a processor and a memory storing a computer program, wherein the video data receiving terminal is in communication connection with each video data acquisition terminal, and when the computer program is executed by the processor, the following steps are realized:
s100, acquiring an initial video data list A= { A 1 ，……，A i ，……，A m (wherein A) i For the initial video data corresponding to the ith video data acquisition end, i= … … m, and m is the number of video data acquisition ends.
Specifically, the acquisition time point of each initial video data in A is consistent; it can be understood that: and each initial video data in A is acquired by a video data acquisition end at the same time point, namely the video starting time and the video duration of each initial video data in A are consistent.
Specifically, the focal length of the video data acquisition end corresponding to each initial video data in the a may be inconsistent; the clearest video data at different focal lengths can be acquired based on all the initial video data.
S200, preprocessing the A to obtain a first intermediate video data list A corresponding to the A 0 ={A 0 1 ，……，A 0 i ，……，A 0 m }，A 0 i Is A i Corresponding first intermediate video data.
Specifically, the first intermediate video data is video data after processing the initial video data, wherein the processing process is a process for eliminating irrelevant information in the image and recovering useful real information; those skilled in the art are aware of any processing method for eliminating irrelevant information in an image and recovering useful real information, which belongs to the protection scope of the present invention, and are not described herein.
S300, obtaining A 0 Corresponding preset video cache region ID list b= { B 1 ，……，B i ，……，B m And will A 0 i Send to B i B in the corresponding preset video buffer area i Is A 0 i A corresponding preset video buffer area ID, wherein in step S300, B is further determined by the following steps i Data storage amount of corresponding preset video cache area:
s301, obtaining A at the current time point 0 Corresponding packet loss rate eta 0 。
Specifically, the preset video cache area ID is a unique identity of a preset video cache area, where the preset video cache area is used to cache the first intermediate video data.
In a specific embodiment, η is also determined in step S301 by 0 ：
S3011, obtaining a preset time point list T= { T in a preset time period 1 ，……，T j ，……，T n }, wherein T is j J= … … n, n being the number of preset time points in the preset time period, is the j-th preset time point in the preset time period.
Specifically, the time interval between two adjacent preset time points is 1s and the ordering of T is in ascending order.
Specifically, the starting time point of the preset time period is that the video data receiving end receives a 0 The time point when the request is transmitted is the time point when the duration of the preset time period is 10-30 s, and preferably the duration of the preset time period is 10s.
S3012, obtaining a first data quantity list D= { D corresponding to T 0 ，……，D r ，……，D n-1 Sum of second data amount list D ' ={D ' 0 ，……，D ' r ，……，D ' n-1 }, wherein D r Is T j-1 Corresponding first data quantity D ' r Is T j-1 A corresponding second data amount, r= … … n-1.
Specifically, the first data amount is the amount of data packets sent to the video data receiving end at a preset time point.
Specifically, the second data amount is the data packet amount received by the video data receiving end at a preset time point.
Preferably, when j=1, T 0 An initial time point before the initial time point of the preset time period, and T 0 The time interval between the start time point of the preset time period and the preset time period is 1s.
S3013, according to D and D ' Acquiring a packet loss rate list eta= { eta corresponding to T 1 ，……，η j ，……，η n }，η j Is T j Corresponding packet loss rate.
Specifically, eta j Meets the following conditions:
η j =1-（（D ' 0 +……+D ' r ）/（D 0 +……+D r ））。
s3014, at the current time point, T j When eta 0 =η j 。
Above-mentioned, can confirm the packet loss rate of different time points through the accumulation of the data packet quantity of receiving and sending in the preset time period, avoid influencing accurate buffer zone size because of the packet loss rate of a time point is higher.
S302, when eta 0 ≤η 0 1 At the time, A is obtained 0 i Data storage amount of corresponding first cache area and will be A 0 i Data storage of the corresponding first cache area is used as B i Data storage capacity of corresponding preset video cache area, wherein eta 0 1 And the first packet loss rate threshold value is preset.
Specifically, η in step S302 0 1 Meets the following conditions:
η 0 1 =min (U) and η 0 1 > 0, wherein U is a historical packet loss rate set; it can be understood that: u comprises a plurality of intermediate packet loss rate lists corresponding to historical time periods, wherein the duration of each historical time period is consistent with the duration of a preset time period, namely U= { C 0 1 ，……，C 0 g ，……，C 0 z -any one of said intermediate packet loss rate list C 0 g ={C 0 g1 ，……，C 0 gj ，……，C 0 gn }，C 0 gj For the packet loss rate at the jth time point in the jth historical time period, g= … … z, z is the number of historical time periods and C 0 gj Meets the following conditions:
C 0 gj =1-（E 0 gj /E gj ) Wherein E is 0 gj E for the number of data packets received by the video data receiving end at the jth time point in the jth historical time period gj And the number of the data packets sent to the video data receiving end at the j time point in the g historical time period.
Above-mentioned, can accurately confirm the threshold value of packet loss rate through historical data, and then accurately dynamic adjustment video buffer area's size.
In a specific embodiment, A is obtained in S302 by the following steps 0 i Data storage amount of the corresponding first cache area:
s3021, the current time point is T j At T j Lower acquisition A 0 i Corresponding first video code rate F 1 ij And A 0 i Corresponding first audio code rate F 2 ij 。
S3022 according to F 1 ij And F 2 ij At T is determined j Lower A 0 i Data storage amount Q of corresponding first cache region 1 ij ，Q 1 ij Meets the following conditions:
Q 1 ij =Q j-1 +（F 1 ij +F 2 ij ) /8, wherein Q j-1 At T j-1 The data storage amount of the corresponding cache area is reduced; it can be understood that: q (Q) j-1 The acquiring manner of (a) may be used as the acquiring manner of the data storage amount of the cache area in step S300, which is not described herein.
S303, when eta 0 1 ＜η 0 ≤η 0 2 At the time, A is obtained 0 i Data storage amount of corresponding second cache area and will be A 0 i Data storage of the corresponding second cache area is used as B i Data storage capacity of corresponding preset video cache area, wherein eta 0 2 And the second packet loss rate threshold value is preset.
Specifically, η in step S303 0 2 Meets the following conditions:
η 0 2 =（∑ z g=1 ∑ n j=1 C 0 gj ）/（z×n）。
above-mentioned, can rationally confirm the threshold value of packet loss rate based on through historical data, and then the size of accurate dynamic adjustment video buffer area.
In a specific embodiment, A is obtained in S303 by the following steps 0 i Data storage amount of the corresponding second cache area:
s3031, the current time point is T j At T j Lower acquisition A 0 i Corresponding second video code rate G 1 ij And A 0 i Corresponding second audio code rate G 2 ij ；
Wherein G is 1 ij Meets the following conditions:
G 1 ij =（η 0 -η 0 1 ）×F 1 ij /η 0 1 ，
wherein G is 2 ij Meets the following conditions:
G 2 ij =（η 0 -η 0 1 ）×F 2 ij /η 0 1 ；
s3032, according to G 1 ij And G 2 ij At T is determined j Lower A 0 i Data storage amount Q of corresponding second cache region 2 ij ，Q 2 ij Meets the following conditions:
Q 2 ij =Q j-1 +（G 1 ij +G 2 ij ）/8。
s304, when eta > eta 0 2 At the time, A is obtained 0 i Data storage amount of corresponding third cache area and will be A 0 i Data storage of the corresponding third cache area as B i And the data storage amount of the corresponding preset video cache area.
In a specific embodiment, A is obtained in S304 by the following steps 0 i Data storage amount of the corresponding third buffer area:
s3041, the current time point is T j At T j Lower acquisition A 0 i Corresponding thirdVideo code rate H 1 ij And A 0 i Corresponding third audio code rate H 2 ij ，
Wherein H is 1 ij Meets the following conditions:
H 1 ij =（（η 0 -η 0 2 ）×（η 0 2 -η 0 1 ）×F 1 ij ）/（η 0 2 ×η 0 1 ）
wherein H is 2 ij Meets the following conditions:
H 2 ij =（（η 0 -η 0 2 ）×（η 0 2 -η 0 1 ）×F 2 ij ）/（η 0 2 ×η 0 1 ）。
s3042 according to H 1 ij And H 2 ij Determination of A 0 i Data storage amount Q of corresponding third cache region 3 i ，Q 3 i Meets the following conditions:
Q 3 i =Q j-1 +（H 1 ij +H 2 ij ）/8。
above-mentioned, can confirm different code rates in order to realize accurate dynamic adjustment video buffer area's size based on different packet loss rate thresholds, avoid the jam of data transmission passageway.
S400, obtaining a second intermediate video data list B from B 0 ={B 0 1 ，……，B 0 i ，……，B 0 m }，B 0 i Is B i And the corresponding second intermediate video data is the first intermediate video data stored in a preset video cache area corresponding to any preset video cache area ID.
S500, B 0 And sending the target video data to the video data receiving end so that the video data receiving end can acquire the target video data.
Specifically, the step S500 further includes the following steps:
s501, obtaining a video data transmission channel ID list P= { P corresponding to a video data receiving end 1 ，……，P x ，……，P s }，P x For the video data transmission channel ID corresponding to the xth video data receiving end, x= … … s, s is the number of video data transmission channels IDs corresponding to the video data receiving end.
Further, the video data transmission channel ID is a unique identity of the video data transmission channel, where the video data transmission channel is a channel for receiving video data in the video data receiving end, and any construction of the channel for receiving video data is known to those skilled in the art, which is not described herein again and falls within the protection scope of the present invention.
S502, B 0 i Divided into B 0 i Corresponding intermediate video slice list P 0 i ={P 0 i1 ，……，P 0 it ，……，P 0 ik And each P 0 it Through P x The corresponding video data transmission channel is sent to the video data receiving end, wherein P is as follows 0 it Is B 0 i T= … … k, k being the number of intermediate video slices; any method for dividing video slices is known to those skilled in the art, and is not described herein.
Further, each P 0 it Are all uniform in size.
S503, when the video data receiving end receives B 0 i Corresponding intermediate video slice list, according to P 0 it The corresponding intermediate video slice IDs are combined into target video data.
Further, the intermediate video slice ID is constructed based on a video data acquisition end ID corresponding to the intermediate video slice, a transmission time point corresponding to the intermediate video slice, and a verification result of a transmission message corresponding to the intermediate video sliceA unique identifier characterizing the identity of the intermediate video slice; it can be understood that: converting the ID of the video data acquisition end into a binary coded vector W1, converting the sending time point corresponding to the intermediate video slice into a binary coded vector W2, converting the verification result of the transmission message corresponding to the intermediate video slice into a binary coded vector W3, and based on W 1 、W 2 And W is 3 Generating an intermediate code vector w= { W 1 ，W 2 ，W 3 Processing W to generate a 34-ary character string as an intermediate video slice ID; those skilled in the art know that any checking method of the transmission message in the prior art belongs to the protection scope of the present invention, and will not be described herein.
The embodiment provides a video data transmission system, which includes: the system comprises a plurality of video data acquisition terminals, a video data receiving terminal, a processor and a memory storing a computer program, wherein the video data receiving terminal is in communication connection with each video data acquisition terminal, and when the computer program is executed by the processor, the following steps are realized: acquiring an initial video data list; preprocessing an initial video data list to obtain a first intermediate video data list; acquiring a preset video cache area ID list according to the first intermediate video data list, sending the first intermediate video data list to a video cache area corresponding to the preset video cache area ID list, determining a target storage amount based on comparison of a target packet loss rate with a first packet loss rate threshold and a second packet loss rate threshold, and sending video data in the preset video cache area corresponding to the target storage amount to the video data receiving end; it can be known that the size of the transmission buffer area can be dynamically adjusted by the size of the packet loss rate, so that the congestion of the data transmission channel can be avoided.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. Those skilled in the art will also appreciate that many modifications may be made to the embodiments without departing from the scope and spirit of the invention. The scope of the present disclosure is defined by the appended claims.

Claims (10)

1. A video data transmission system, the system comprising: the system comprises a plurality of video data acquisition terminals, a video data receiving terminal, a processor and a memory storing a computer program, wherein the video data receiving terminal is in communication connection with each video data acquisition terminal, and when the computer program is executed by the processor, the following steps are realized:
s100, acquiring an initial video data list A= { A 1 ，……，A i ，……，A m (wherein A) i For the initial video data corresponding to the ith video data acquisition end, i= … … m, and m is the number of video data acquisition ends;
s200, preprocessing the A to obtain a first intermediate video data list A corresponding to the A 0 ={A 0 1 ，……，A 0 i ，……，A 0 m }，A 0 i Is A i Corresponding first intermediate video data;
s300, obtaining A 0 Corresponding preset video cache region ID list b= { B 1 ，……，B i ，……，B m And will A 0 i Send to B i B in the corresponding preset video buffer area i Is A 0 i A corresponding preset video buffer area ID, wherein in step S300, B is further determined by the following steps i Data storage amount of corresponding preset video cache area:
s301, obtaining A at the current time point 0 Corresponding packet loss rate eta 0 ；
S302, when eta 0 ≤η 0 1 At the time, A is obtained 0 i Data storage amount of corresponding first cache area and will be A 0 i Data storage of the corresponding first cache area is used as B i Data storage capacity of corresponding preset video cache area, wherein eta 0 1 For the preset first packet loss rateA threshold value;
s303, when eta 0 1 ＜η 0 ≤η 0 2 At the time, A is obtained 0 i Data storage amount of corresponding second cache area and will be A 0 i Data storage of the corresponding second cache area is used as B i Data storage capacity of corresponding preset video cache area, wherein eta 0 2 A second preset packet loss rate threshold value;
s304, when eta 0 ＞η 0 2 At the time, A is obtained 0 i Data storage amount of corresponding third cache area and will be A 0 i Data storage of the corresponding third cache area as B i Data storage capacity of a corresponding preset video cache area;
s400, obtaining a second intermediate video data list B from B 0 ={B 0 1 ，……，B 0 i ，……，B 0 m }，B 0 i Is B i The corresponding second intermediate video data is first intermediate video data stored in a preset video cache area corresponding to any preset video cache area ID;
s500, B 0 And sending the target video data to the video data receiving end so that the video data receiving end can acquire the target video data.
2. The video data transmission system of claim 1, wherein the acquisition time points of each initial video data in a are identical.
3. The video data transmission system of claim 2, wherein the focal length of the video data acquisition end corresponding to each initial video data in a is not uniform.
4. The video data transmission system according to claim 1, wherein the first intermediate video data is video data after processing the initial video data, and wherein the processing is a process for removing extraneous information from the image and recovering useful real information.
5. The video data transmission system according to claim 1, wherein η is further determined in step S301 by 0 ：
S3011, obtaining a preset time point list T= { T in a preset time period 1 ，……，T j ，……，T n }, wherein T is j J= … … n, n being the number of preset time points in the preset time period;
s3012, obtaining a first data quantity list D= { D corresponding to T 0 ，……，D r ，……，D n-1 Sum of second data amount list D ' ={D ' 0 ，……，D ' r ，……，D ' n-1 }, wherein D r Is T j-1 Corresponding first data quantity D ' r Is T j-1 A corresponding second number of data, r= … … n-1;
s3013, according to D and D ' Acquiring a packet loss rate list eta= { eta corresponding to T 1 ，……，η j ，……，η n }，η j Is T j Corresponding packet loss rate; wherein eta j Meets the following conditions:
η j =1-（（D ' 0 +……+D ' r ）/（D 0 +……+D r ））；
s3014, at the current time point, T j When eta 0 =η j 。
6. The video data transmission system according to claim 5, wherein η in step S302 0 1 Meets the following conditions:
η 0 1 =min (U) and η 0 1 > 0,U is a historical packet loss rate set, where u= { C 0 1 ，……，C 0 g ，……，C 0 z Any intermediate packet loss rate list C 0 g ={C 0 g1 ，……，C 0 gj ，……，C 0 gn }，C 0 gj For the packet loss rate at the jth time point in the jth historical time period, g= … … z, z is the number of historical time periods and C 0 gj Meets the following conditions:
C 0 gj =1-（E 0 gj /E gj ) Wherein E is 0 gj E for the number of data packets received by the video data receiving end at the jth time point in the jth historical time period gj And the number of the data packets sent to the video data receiving end at the j time point in the g historical time period.
7. The video data transmission system according to claim 6, wherein η in step S303 0 2 Meets the following conditions:
η 0 2 =（∑ z g=1 ∑ n j=1 C 0 gj ）/（z×n）。
8. the video data transmission system according to claim 5, wherein a is acquired in S302 by 0 i Data storage amount of the corresponding first cache area:
s3021, the current time point is T j At T j Lower acquisition A 0 i Corresponding first video code rate F 1 ij And A 0 i Corresponding first audio code rate F 2 ij ；
S3022 according to F 1 ij And F 2 ij At T is determined j Lower A 0 i Data storage amount Q of corresponding first cache region 1 ij ，Q 1 ij Meets the following conditions:
Q 1 ij =Q j-1 +（F 1 ij +F 2 ij ) /8, wherein Q j-1 At T j-1 The data storage amount of the corresponding cache area is determined.
9. The video data transmission system according to claim 8, wherein a is acquired in S303 by 0 i Data storage amount of the corresponding second cache area:
s3031, the current time point is T j At T j Lower acquisition A 0 i Corresponding second video code rate G 1 ij And A 0 i Corresponding second audio code rate G 2 ij ；
Wherein G is 1 ij Meets the following conditions:
G 1 ij =（η 0 -η 0 1 ）×F 1 ij /η 0 1 ，
wherein G is 2 ij Meets the following conditions:
G 2 ij =（η 0 -η 0 1 ）×F 2 ij /η 0 1 ；
s3032, according to G 1 ij And G 2 ij At T is determined j Lower A 0 i Data storage amount Q of corresponding second cache region 2 ij ，Q 2 ij Meets the following conditions:
Q 2 ij =Q j-1 +（G 1 ij +G 2 ij ）/8。
10. the video data transmission system according to claim 8, wherein a is acquired in S304 by 0 i Data storage amount of the corresponding third buffer area:
s3041, the current time point is T j At T j Lower acquisition A 0 i Corresponding firstThree video code rate H 1 ij And A 0 i Corresponding third audio code rate H 2 ij ，
Wherein H is 1 ij Meets the following conditions:
H 1 ij =（（η 0 -η 0 2 ）×（η 0 2 -η 0 1 ）×F 1 ij ）/（η 0 2 ×η 0 1 ）
wherein H is 2 ij Meets the following conditions:
H 2 ij =（（η 0 -η 0 2 ）×（η 0 2 -η 0 1 ）×F 2 ij ）/（η 0 2 ×η 0 1 ）；
s3042 according to H 1 ij And H 2 ij Determination of A 0 i Data storage amount Q of corresponding third cache region 3 i ，Q 3 i Meets the following conditions:
Q 3 i =Q j-1 +（H 1 ij +H 2 ij ）/8。
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CN103533451A (en) * 2013-09-30 2014-01-22 广州华多网络科技有限公司 Method and system for regulating jitter buffer
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