CN109121019A - For the dynamic buffering dispatching method of SVC-DASH VOD system, equipment and storage equipment - Google Patents

For the dynamic buffering dispatching method of SVC-DASH VOD system, equipment and storage equipment Download PDF

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CN109121019A
CN109121019A CN201811063582.2A CN201811063582A CN109121019A CN 109121019 A CN109121019 A CN 109121019A CN 201811063582 A CN201811063582 A CN 201811063582A CN 109121019 A CN109121019 A CN 109121019A
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buffer area
bmax
video
buffer
layer
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CN109121019B (en
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余林琛
蒋宇浩
涂大喜
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China University of Geosciences
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China University of Geosciences
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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]
    • H04N21/80—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
    • 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
    • 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
    • H04N21/2401—Monitoring of the client 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
    • H04N21/26216—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving the channel capacity, e.g. network 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]
    • H04N21/40—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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4335—Housekeeping operations, e.g. prioritizing content for deletion because of storage space restrictions
    • 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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP 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
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The present invention provides for the dynamic buffering dispatching method of SVC-DASH VOD system, equipment and storage equipment, method includes: the buffer status according to buffer area, carries out dynamic regulation to the length of buffer area, improves the fluency and smoothness of video playing.For the dynamic buffering controlling equipment and storage equipment of SVC-DASH VOD system, for realizing the dynamic buffering dispatching method for SVC-DASH VOD system.The beneficial effects of the present invention are: technical solution of the present invention has better performance in terms of the smoothness of video playing fluency and play quality in the case where not losing video quality compared with existing SVC-DASH dispatching method.

Description

Dynamic buffering dispatching method, equipment and storage for SVC-DASH VOD system Equipment
Technical field
The present invention relates to audiovisual applications fields, more particularly, to the dynamic buffering dispatching party of SVC-DASH VOD system Method, equipment and storage equipment.
Background technique
Nowadays, the distribution and transmission of Web content are significant increases, and wherein video content occupies significant proportion. Predict that, by 2021, annual global IP flow is up to 3.3ZB, and video flow will occupy according to Cisco VNI (Cisco VNI) 82% ratio, occupies leading position.In terms of the transmission of video, in face of the isomerism of terminal and network, it would be desirable to be directed to The network of different equipment and variation provides the video of different quality.HTTP adaptive code stream (HAS) technology is come into being, client End can select the video slicing of different quality according to own situation, and a member of DASH as HAS, by many excellent of oneself Gesture has been developed as current state-of-the-art video flowing communications.Simultaneously as H.264/SVC (scalable video Coding server storage) can be greatly saved, and possesses more flexible shaping modes, in recent years more and more SVC-DASH scheme is suggested.
However, some problems still have, for example it will appear video quality in the network environment of frequent fluctuation and frequently cut Phenomena such as video breaks is changed or even occurred, user's viewing experience is seriously affected.
Summary of the invention
To solve the above-mentioned problems, the present invention provides for SVC-DASH VOD system dynamic buffering dispatching method, Equipment and storage equipment are mainly comprised the steps that for the dynamic buffering dispatching method of SVC-DASH VOD system
S101: the video source of SVC format is obtained, video source is uniformly separated into n video slicing；And according to video source Each video slicing is uniformly separated into m video block by quality level, and m video block of each video slicing is stacked into m Layer, and all video blocks are stored in server；Each video block is corresponding with a fragment i and a sequence j；Its In, m and n are the integer more than or equal to 1；The value range of i is [1, n], and the value range of j is [1, m]；Initialize i's and j Value is 1；
S102: initialization buffer area parameter: the value of buffer area height Lmax is set as m, setting caches section length Bmax's Value is [min, max], and it is highly the rectangular area of Lmax that the Buffer size of buffer area, which is that length is Bmax,；Initialize Bmax's Value is max；Buffer area is divided into Lmax*Bmax memory block, these memory blocks according to coordinate [1,1], [2,1] ... [Bmax, 1], [1,2] ... [Bmax, 2] ... [Bmax, Lmax] sequential, for storing the video block；Wherein, [1,1], [2,1] ... [Bmax, 1] is buffer area first layer, and [1,2], [2,2] ... [Bmax, 2] is the buffer area second layer, [1, j], [2, j] ... [Bmax, j] is buffer area jth layer,
[1, Lmax], [2, Lmax] ... [Bmax, Lmax] are Lmax layers of buffer area；
S103: downloading slicing number is i, the video block of layer serial number j to first empty memory block of buffer area,
S104: after the downloading for completing the video block, buffer area buffer status data are updated；The buffer status data packet Include the fragment number of the newest video block being downloaded in the downloading number and buffer area of each layer video block of buffer area；
S105: section length Bmax is cached according to buffer status data point reuse；
S106: judge whether that downloading terminates or videoconference client is closed；If so, arriving step S108；If it is not, then arriving Step S107；
S107: traversing all memory blocks of buffer area, first empty cache blocks is searched, according to first empty cache blocks Determine the fragment i and sequence j of next video block being downloaded；Back to step S103；
S108: terminating caching program, completes dynamic buffering scheduling.
Further, in the step S105, the specific steps of section length Bmax are cached according to buffer status data point reuse Are as follows:
S201: Rule of judgment Bmax > buffer_ken1>=min and buffer_lenm<buffer_len1Whether simultaneously at It is vertical；If so, Bmax is updated to Bmax-1；If it is not, then arriving step S202；Wherein, buffer_len1It is the in buffer area the 1st The downloading number of layer video block, buffer_lenmFor the downloading number of the top video block of buffer area；
S202: Rule of judgment Bmax=buffer_len1< max and buffer_lenm=buffer_len1Whether simultaneously at It is vertical；If so, Bmax is updated to Bmax+1；If it is not, then Bmax value is constant.
Further, in the step S106, after all video slicings have been downloaded, representing downloading terminates.
Further, in the step S107, according to buffer area height Lmax, caching section length Bmax and buffer status tune The specific steps of fragment i and sequence j corresponding to whole next video block being downloaded are as follows:
S301: judging whether buffer area has the layer of remaining memory block, judges since buffer area first layer, and order judges the number of plies P=1；
S302: judge whether p is less than or equal to Lmax；If so, arriving step S303；If it is not, then arriving step S306；
S303: judge whether pth layer has remaining memory block in buffer area；If so, arriving step S305；If it is not, then arriving step Rapid S304；
S304: p is updated to p+1, return step S302；
S305: sequence j is assigned a value of p, judges whether pth layer has video block；If so, i is equal to the newest downloading of pth layer The abscissa of video block add 1；If it is not, then i is equal to the abscissa of the 1st layer of first video block of buffer area；
S306: whether the abscissa for judging the last one video block of buffer area first layer is n；If so, terminating downloading；If It is no, then arrive step S307；
S307: download thread is hung up, and the next of the abscissa that i is the 1st layer of the last one video block of buffer area is arranged Number, sequence j is 1；It loops to determine whether buffer area empty memory block occurs, once there is empty memory block, then continues to download；Slow While depositing video slicing, the lasting taking-up video slicing from buffer area is decoded to client and broadcasts by decoding broadcasting thread It puts, whenever taking a video slicing away, remaining video slicing successively moves forward in buffer area.
A kind of storage equipment, the storage equipment store instruction and data are for realizing for SVC-DASH VOD system Dynamic buffering dispatching method.
Dynamic buffering controlling equipment for SVC-DASH VOD system, comprising: processor and the storage equipment；It is described Processor loads and executes the instruction in the storage equipment and data for realizing the dynamic for SVC-DASH VOD system Buffer scheduling method.
Technical solution provided by the invention has the benefit that compared with existing SVC-DASH dispatching method, this The technical solution of invention is not in the case where losing video quality, in terms of the smoothness of video playing fluency and play quality There is better performance.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the flow chart in the embodiment of the present invention for the dynamic buffering dispatching method of SVC-DASH VOD system；
Fig. 2 is the schematic diagram of video cache section model in the embodiment of the present invention；
Fig. 3 is the detailed process in the embodiment of the present invention for the dynamic buffering dispatching method of SVC-DASH VOD system Figure；
Fig. 4 is the schematic diagram that hardware device works in the embodiment of the present invention.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail A specific embodiment of the invention.
The embodiment provides dynamic buffering dispatching method, equipment and the storages for SVC-DASH VOD system Equipment is used for video cache section model shown in Fig. 2.
Referring to FIG. 1, Fig. 1 is the dynamic buffering dispatching method for being used for SVC-DASH VOD system in the embodiment of the present invention Flow chart specifically comprises the following steps:
S101: the video source of SVC format is obtained, video source is uniformly separated into n video slicing；And according to video source Each video slicing is uniformly separated into m video block by quality level, and m video block of each video slicing is stacked into m Layer, and all video blocks are stored in server；Each video block is corresponding with a fragment i and a sequence j；Its In, m and n are the integer more than or equal to 1；The value range of i is [1, n], and the value range of j is [1, m]；Initialize i's and j Value is 1；
S102: initialization buffer area parameter: the value of buffer area height Lmax is set as m, setting caches section length Bmax's Value is [min, max], and it is highly the rectangular area of Lmax that the Buffer size of buffer area, which is that length is Bmax,；Initialize Bmax's Value is max；Buffer area is divided into Lmax*Bmax memory block, these memory blocks according to coordinate [1,1], [2,1] ... [Bmax, 1], [1,2] ... [Bmax, 2] ... [Bmax, Lmax] sequential, for storing the video block；Wherein, [1,1], [2,1] ... [Bmax, 1] is buffer area first layer, and [1,2], [2,2] ... [Bmax, 2] is the buffer area second layer, [1, j], [2, j] ... [Bmax, j] is buffer area jth layer, and [1, Lmax], [2, Lmax] ... [Bmax, Lmax] are Lmax layers of buffer area；Entire caching Area shares m floor；
S103: downloading slicing number is i, the video block of layer serial number j to first empty memory block of buffer area,
S104: after the downloading for completing the video block, buffer area buffer status data are updated；The buffer status data packet Include the fragment number of the newest video block being downloaded in the downloading number and buffer area of each layer video block of buffer area；
S105: section length Bmax is cached according to buffer status data point reuse；
S106: judge whether that downloading terminates or videoconference client is closed；If so, arriving step S108；If it is not, then arriving Step S107；
S107: traversing all memory blocks of buffer area, first empty cache blocks is searched, according to first empty cache blocks Determine the fragment i and sequence j of next video block being downloaded；Back to step S103；
S108: terminating caching program, completes dynamic buffering scheduling.
In the step S105, the specific steps of buffer area height Lmax are adjusted according to averaging network bandwidth avgBW are as follows:
S201: Rule of judgment Bmax > buffer_len1>=min and buffer_lenm<buffer_len1Whether simultaneously at It is vertical；If so, Bmax is updated to Bmax-1；If it is not, then arriving step S202；Wherein, buffer_len1It is the in buffer area the 1st The downloading number of layer video block, buffer_lenmFor the downloading number of the top video block of buffer area；
S202: Rule of judgment Bmax=buffer_len1< max and buffer_lenm=buffer_len1Whether simultaneously at It is vertical；If so, Bmax is updated to Bmax+1；If it is not, then Bmax value is constant.
In the step S106, after all video slicings have been downloaded, representing downloading terminates.
It is next according to buffer area height Lmax, caching section length Bmax and buffer status adjustment in the step S107 The specific steps of fragment i and sequence j corresponding to the video block being downloaded are as follows:
S301: judging whether buffer area has the layer of remaining memory block, judges since buffer area first layer, and order judges the number of plies P=1；
S302: judge whether p is less than or equal to Lmax；If so, arriving step S303；If it is not, then arriving step S306；
S303: judge whether pth layer has remaining memory block in buffer area；If so, arriving step S305；If it is not, then arriving step Rapid S304；
S304: p is updated to p+1, return step S302；
S305: sequence j is assigned a value of p, judges whether pth layer has video block；If so, i is equal to the newest downloading of pth layer The abscissa of video block add 1；If it is not, then i is equal to the abscissa of the 1st layer of first video block of buffer area；
S306: whether the abscissa for judging the last one video block of buffer area first layer is n；If so, terminating downloading；If It is no, then arrive step S307；
S307: download thread is hung up, and the next of the abscissa that i is the 1st layer of the last one video block of buffer area is arranged Number, sequence j is 1；It loops to determine whether buffer area empty memory block occurs, once there is empty memory block, then continues to download；Slow While depositing video slicing, the lasting taking-up video slicing from buffer area is decoded to client and broadcasts by decoding broadcasting thread It puts, whenever taking a video slicing away, remaining video slicing successively moves forward in buffer area.
It is illustrated in figure 3 in the embodiment of the present invention for the detailed of the dynamic buffering dispatching method of SVC-DASH VOD system Thin flow chart presents the implementing procedure of entire dynamic buffering dispatching method, the explanation of each variable corresponding with Fig. 3 such as 1 institute of table Show:
1 argument table 1 of table
I (1~n) Video block fragment number
J (1~m) Video block sequence number
Lmax Buffer area height
Bmax (min~max) Cache section length
Qk(1≤k≤m) The code rate of kth layer video
buffer_lenp(1≤p≤m) The number of buffer area pth layer video block downloading
last_idq(1≤q≤n) The fragment number of the video block of the newest downloading of buffer area q floor
avgBW Recent average bandwidth
By comparing with existing dispatching method, technical solution of the present invention is (flat under four kinds of different network environments Surely, gradual change, mutation, shake), in the case where not losing video quality, in the steady of video playing fluency and play quality Degree aspect has better performance.
Fig. 4 is referred to, Fig. 4 is the hardware device operation schematic diagram of the embodiment of the present invention, and the hardware device specifically includes: For the dynamic buffering controlling equipment 401 of SVC-DASH VOD system, processor 402 and storage equipment 403.
Dynamic buffering controlling equipment 401 for SVC-DASH VOD system: described for SVC-DASH VOD system Dynamic buffering controlling equipment 401 realizes the dynamic buffering dispatching method for being used for SVC-DASH VOD system.
Processor 402: the processor 402 loads and executes the instruction in the storage equipment 403 and data for real The existing dynamic buffering dispatching method for being used for SVC-DASH VOD system.
Store equipment 403: 403 store instruction of storage equipment and data；The storage equipment 403 is for realizing described Dynamic buffering dispatching method for SVC-DASH VOD system.
The beneficial effects of the present invention are: technical solution of the present invention is not compared with existing SVC-DASH dispatching method In the case where losing video quality, there is better performance in terms of the smoothness of video playing fluency and play quality.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (6)

1. being used for the dynamic buffering dispatching method of SVC-DASH VOD system, it is characterised in that: the following steps are included:
S101: the video source of SVC format is obtained, video source is uniformly separated into n video slicing；And according to the quality of video source Each video slicing is uniformly separated into m video block by level, and m video block of each video slicing is stacked into m layers, And all video blocks are stored in server；Each video block is corresponding with a fragment i and a sequence j；Wherein, M and n is the integer more than or equal to 1；The value range of i is [1, n], and the value range of j is [1, m]；Initialize the value of i and j It is 1；
S102: initialization buffer area parameter: set the value of buffer area height Lmax as m, set cache section length Bmax value as [min, max], the Buffer size of buffer area are that length is Bmax, are highly the rectangular area of Lmax；Initialization Bmax value be max；Buffer area is divided into Lmax*Bmax memory block, these memory blocks according to coordinate [1,1], [2,1] ... [Bmax, 1], [1,2] ... [Bmax, 2] ... [Bmax, Lmax] sequential, for storing the video block；Wherein, [1,1], [2,1] ... [Bmax, 1] is buffer area first layer, and [1,2], [2,2] ... [Bmax, 2] is the buffer area second layer, [1, j], [2, j] ... [Bmax, j] is buffer area jth layer, and [1, Lmax], [2, Lmax] ... [Bmax, Lmax] are Lmax layers of buffer area；
S103: downloading slicing number is i, the video block of layer serial number j to first empty memory block of buffer area；
S104: after the downloading for completing the video block, buffer area buffer status data are updated；The buffer status data include slow Deposit the fragment number of the newest video block being downloaded in the downloading number and buffer area of each layer video block in area；
S105: section length Bmax is cached according to buffer status data point reuse；
S106: judge whether that downloading terminates or videoconference client is closed；If so, arriving step S108；If it is not, then arriving step S107；
S107: traversing all memory blocks of buffer area, searches first empty cache blocks, is determined according to first empty cache blocks The fragment i and sequence j of next video block being downloaded；Back to step S103；
S108: terminating caching program, completes dynamic buffering scheduling.
2. being used for the dynamic buffering dispatching method of SVC-DASH VOD system as described in claim 1, it is characterised in that: in step In rapid S105, the specific steps of section length Bmax are cached according to buffer status data point reuse are as follows:
S201: Rule of judgment Bmax > buffer_len1>=min and buffer_lenm<buffer_len1Whether set up simultaneously；If It is that Bmax is then updated to Bmax-1；If it is not, then arriving step S202；Wherein, buffer_len1For the 1st layer video in buffer area The downloading number of block, buffer_lenmFor the downloading number of the top video block of buffer area；
S202: Rule of judgment Bmax=buffer_len1< max and buffer_lenm=buffer_len1Whether set up simultaneously； If so, Bmax is updated to Bmax+1；If it is not, then Bmax value is constant.
3. being used for the dynamic buffering dispatching method of SVC-DASH VOD system as described in claim 1, it is characterised in that: in step In rapid S106, after all video slicings have been downloaded, representing downloading terminates.
4. being used for the dynamic buffering dispatching method of SVC-DASH VOD system as described in claim 1, it is characterised in that: in step In rapid S107, the step of fragment i and sequence j of next video block being downloaded are determined according to first empty cache blocks Are as follows:
S301: judging whether buffer area has the layer of remaining memory block, judges since buffer area first layer, and order judges number of plies p= 1；
S302: judge whether p is less than or equal to Lmax；If so, arriving step S303；If it is not, then arriving step S306；
S303: judge whether pth layer has remaining memory block in buffer area；If so, arriving step S305；If it is not, then arriving step S304；
S304: p is updated to p+1, return step S302；
S305: sequence j is assigned a value of p, judges whether pth layer has video block；If so, i is equal to the view of the newest downloading of pth layer The abscissa of frequency block adds 1；If it is not, then i is equal to the abscissa of the 1st layer of first video block of buffer area；
S306: whether the abscissa for judging the last one video block of buffer area first layer is n；If so, terminating downloading；If it is not, Then arrive step S307；
S307: download thread is hung up, and the lower No.1 for the abscissa that i is the 1st layer of the last one video block of buffer area, layer is arranged Serial number j is 1；It loops to determine whether buffer area empty memory block occurs, once there is empty memory block, then continues to download；It is regarded in caching While frequency division piece, decoding plays thread and lasting taking-up video slicing to the client from buffer area is decoded broadcasting, often When taking a video slicing away, remaining video slicing successively moves forward in buffer area.
5. a kind of storage equipment, it is characterised in that: the storage equipment store instruction and data are for realizing Claims 1 to 4 Any dynamic buffering dispatching method for being used for SVC-DASH VOD system.
6. being used for the dynamic buffering controlling equipment of SVC-DASH VOD system, it is characterised in that: include: processor and claim Storage equipment described in 5；The processor loads and executes instruction and data in the storage equipment and wants for realizing right The dynamic buffering dispatching method that any one is used for SVC-DASH VOD system described in asking 1~4.
CN201811063582.2A 2018-09-12 2018-09-12 Dynamic cache scheduling method, device and storage device for SVC-DASH on-demand system Expired - Fee Related CN109121019B (en)

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