CN116112712B - Self-adaptive video-audio video transmission playing method - Google Patents
Self-adaptive video-audio video transmission playing method Download PDFInfo
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- CN116112712B CN116112712B CN202310064594.1A CN202310064594A CN116112712B CN 116112712 B CN116112712 B CN 116112712B CN 202310064594 A CN202310064594 A CN 202310064594A CN 116112712 B CN116112712 B CN 116112712B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 410
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 16
- 230000009365 direct transmission Effects 0.000 claims abstract description 12
- 238000012937 correction Methods 0.000 claims description 9
- 230000003044 adaptive effect Effects 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 208000032370 Secondary transmission Diseases 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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
- H04N21/25—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
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
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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
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2405—Monitoring of the internal components or processes of the server, e.g. server load
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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
- H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
- H04N21/2407—Monitoring of transmitted content, e.g. distribution time, number of downloads
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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
- H04N21/25—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
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
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- 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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to the field of data processing, in particular to a self-adaptive video and audio transmission playing method, which comprises the following steps that S1, a receiving terminal selects corresponding video and audio from a cloud platform; step S2, the central control unit determines the memory of the video and audio according to the resolution and duration of the video and audio; step S3, the central control unit periodically detects the transmission flow of the transmission unit for the video and audio when controlling the transmission unit to transmit the video and audio by using a direct transmission mode; and S4, the central control unit detects the transmission flow of the transmission unit aiming at the video and audio in real time to judge whether to secondarily adjust the transmission occupancy rate standard of the video and audio or whether to secondarily packetize the video and audio or the audio or video to transmit until the video and audio or video is transmitted. According to the invention, the video transmission flow is accurately controlled by the central control unit, so that the video transmission precision and the video transmission stability are improved.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a self-adaptive video and audio transmission playing method.
Background
At present, video flow is not monitored when video and audio video is transmitted and played, so that transmission accuracy is low, and blocking and unstable transmission occur.
Chinese patent publication No.: CN113747063a discloses a method, a device, an electronic device and a readable storage medium for video transmission, wherein the method sends a transmission signal to a preset device through a UDP data transmission channel established with the preset device; acquiring a plurality of groups of image information sent by preset equipment through a UDP data transmission channel established with the preset equipment, wherein each group of image information comprises a plurality of data packets, each group of image information is obtained by compressing and packetizing an original image of a corresponding frame through the preset equipment, each data packet in each group of image information also comprises packet number information and total packet number information, the packet number information represents the sequence of the data packets in each group of image information, and the total packet number information represents the total number of the data packets in each group of image information; based on each group of image information, determining preview images respectively corresponding to the original images of the corresponding frames; and generating a preview video based on the preview images respectively corresponding to the original images of the corresponding frames. The method can reduce the blocking of the video and improve the fluency. However, this method does not monitor the transmission flow, and thus it can be seen that the method has the following problems: the transmission precision is low and the transmission is unstable.
Disclosure of Invention
Therefore, the invention provides a self-adaptive video and audio transmission playing method, which is used for solving the problems of low video and audio transmission precision and unstable transmission caused by the fact that transmission flow is not monitored in the prior art.
In order to achieve the above objective, the present invention provides a method for transmitting and playing an adaptive video, comprising the steps of S1, selecting a corresponding video from a cloud platform by a receiving terminal, primarily identifying corresponding basic parameters of the video by an identifying terminal, and sending each basic parameter to a central control unit, wherein the central control unit sets a transmission parameter standard for the video according to the received basic parameters, the basic parameters in the video include resolution of the video and duration of the video, and the transmission parameter standard for the video includes a transmission flow standard and a transmission occupancy standard;
step S2, the central control unit determines the memory of the video and audio according to the resolution and the duration of the video and audio, and primarily determines the transmission mode of the transmission unit for the video and audio according to the memory;
step S3, the central control unit periodically detects the transmission flow of the transmission unit for the video and audio when controlling the transmission unit to transmit the video and audio in a direct transmission mode, and judges whether to adjust the transmission occupancy rate standard for the video and audio to a corresponding value or to perform sub-package transmission processing on the video and audio according to the detected transmission flow;
And S4, when the central control unit finishes adjusting the transmission occupancy rate standard of the video and the audio or video or finishing the sub-package transmission processing of the video and the audio, the central control unit detects the transmission flow of the video and the video of the transmission unit in real time to judge whether to secondarily adjust the transmission occupancy rate standard of the video and the video or secondarily sub-package transmission processing of the video and the video until the video and the video are transmitted.
Further, in the step S2, the central control unit marks the memory for the av video as G, and sets g=a×t+b×p 2 Wherein a is a first weight coefficient, a=0.55 Mb/s is set, b is a second weight coefficient, b=0.45 Mb/Pt is set 2 T is the duration of the video, and P is the resolution of the video.
Further, in the step S3, the central control unit compares the obtained memory G of the video and audio with a corresponding preset memory, determines a transmission mode of the transmission unit for the video and audio according to the comparison result, and sets a first preset memory G1 and a second preset memory G2 in the central control unit, wherein G1 is smaller than G2,
if G is less than or equal to G1, the central control unit judges and controls the transmission unit to transmit the video and audio to the receiving terminal in a direct transmission mode;
If G1 is more than G and less than or equal to G2, the central control unit preliminarily judges that the transmission unit is controlled to transmit the video and audio to the receiving terminal in a direct transmission mode, the central control unit periodically detects the average transmission flow Qa of the transmission unit for the video and audio in the process of transmitting the video and audio by the transmission unit, and judges whether to control the transmission unit to perform sub-package transmission processing on the video and audio according to the Qa;
if G is more than G2, the central control unit judges and controls the transmission unit to transmit the video and audio to the receiving terminal in a sub-packet transmission mode, and further judges the sub-packet mode aiming at the video and audio according to the basic parameters of the video and audio.
Further, the central control unit divides the transmission process of the video and audio into a plurality of transmission periods under a first preset condition, and detects the average transmission flow Qa of the video and audio in the transmission period according to the single transmission period, and judges whether the transmission flow of the video and audio in the transmission unit accords with the standard according to the Qa, the central control unit is provided with a first preset transmission flow Qa1 and a second preset transmission flow Qa2, wherein Qa1 is smaller than Qa2,
If Qa is less than or equal to Qa1, the central control unit determines that the transmission flow of the video and audio by the transmission unit in the period does not meet a preset standard, the central control unit calculates a difference delta Qa between Qa1 and Qa and adjusts the maximum occupancy rate C of the transmission unit for the video and audio transmission to a corresponding value according to delta Qa, and delta qa=qa1-Qa is set;
if Qa1 is more than Qa and less than or equal to Qa2, the central control unit preliminarily judges that transmission fluctuation occurs in the transmission process of the video and audio by the transmission unit, the central control unit detects the maximum transmission flow Qamax and the minimum transmission flow Qamin of the transmission unit in the transmission period, and further judges whether the transmission process of the video and audio by the transmission unit accords with a preset standard according to Qamax and Qamin;
if Qa is more than Qa2, the central control unit determines that the transmission flow of the video and audio in the period of the transmission unit accords with a preset standard;
the first preset condition is that the central control unit judges that the memory G of the video and audio meets G1 & ltG & gtG 2.
Further, the central control unit increases the maximum occupancy rate C of the transmission unit for the video and audio transmission to a corresponding value according to DeltaQa under a second preset condition, a first preset transmission flow difference DeltaQa 1 and a second preset transmission flow difference DeltaQa 2 are arranged in the central control unit, deltaQa 1 < DeltaQa2,
If delta Qa is less than or equal to delta Qa1, the central control unit does not adjust the maximum occupancy C of the transmission unit for the video and audio transmission;
if delta Qa1 is less than delta Qa2, the central control unit selects a first occupancy rate adjustment coefficient alpha 1 to increase the maximum occupancy rate C of the transmission unit for the video transmission to a corresponding value, and 1 < alpha 1 < 1.2 is set;
if Δqa > - Δqa2, the central control unit selects a second occupancy adjustment coefficient α2 to increase the maximum occupancy C of the transmission unit for the video transmission to a corresponding value, and sets α2=α1× (2- Δqa2/Δqa);
when the central control unit selects an ith occupancy rate adjustment coefficient alpha i to adjust the maximum occupancy rate C of the video and audio transmission by the transmission unit, setting i=1 and 2, setting the maximum occupancy rate of the adjusted transmission unit as C ', and setting C' =C×alpha i;
the second preset condition is that the central control unit judges that the memory G of the video and audio meets G & gtG 2.
Further, the central control unit detects the maximum transmission flow Qamax of the transmission unit for the video and the minimum transmission flow Qamin of the transmission unit for the video in a single transmission period under a third preset condition, calculates the difference DeltaQ between Qamax and Qamin, judges whether the transmission flow of the transmission unit in the transmission period fluctuates according to DeltaQ, the central control unit is provided with a preset transmission flow critical difference DeltaQ 0,
If DeltaQ > DeltaQ0, the central control unit judges that the transmission flow of the transmission unit in the transmission period fluctuates, the central control unit selects a first occupancy rate correction coefficient j1 to correct the maximum occupancy rate C of the transmission unit for the video and audio transmission so as to reduce C to a corresponding value, and the value of C is set to be 0.83 < j1 < 1;
if delta Q is less than or equal to delta Q0, the central control unit judges that the transmission flow of the transmission unit in the transmission period does not fluctuate, and judges that the transmission flow of the transmission unit in the period for the video and audio does not accord with a preset standard, the central control unit selects a second occupancy rate correction coefficient j2 to correct the maximum occupancy rate C of the transmission unit for the video and audio transmission so as to increase C to a corresponding value, and the value of 1 < j2 < 1.3 is set;
the central control unit selects an x-th occupancy rate correction coefficient jx to correct the maximum occupancy rate of the adjusted transmission unit to be C ', x=1 and 2 are set, the maximum occupancy rate of the corrected transmission unit for video and audio transmission is set to be C ', and C ' =C multiplied by jx is set;
the third preset condition is that the average transmission flow Qa of the video and audio in a single transmission period of the transmission unit meets Qa1 < Qa less than or equal to Qa2.
Further, the central control unit performs sub-packet transmission according to the difference Δg between G and G2 under a fourth preset condition, and sets Δg=g-G2, wherein the central control unit is preset with a first memory difference Δg1 and a second memory difference Δg2,
the delta G is less than or equal to delta G1, the central control unit judges that the video and audio is divided into a plurality of local videos by taking time as a standard, and a plurality of data packets aiming at the corresponding local videos are sequentially generated;
the delta G1 is less than or equal to delta G2, and the central control unit judges that the video and audio video is divided into a plurality of local videos by taking time as a standard so as to form a plurality of data packets;
the delta G > -delta G2, wherein the central control unit judges that the video and audio frequency is divided into a plurality of local videos by taking time as a standard so as to form a plurality of data packets;
and the fourth preset condition is that the central control unit judges that the memory G of the video and audio meets G & gtG 2.
Further, the central control unit calculates the region scoring value H for the picture in the video and audio under the fifth preset condition, determines the dividing number of the picture for the video and audio according to the scoring value, and setsH=d×g+e×p, where d is the first weight coefficient, d=0.42 Mb is set -1 ，e＝0.58Pt -1 ,
The central control unit is provided with a first region score value H1, a second region score value H2, a first adjustment coefficient beta 1 and a second adjustment coefficient beta 2, wherein H1 is less than H2,1 is less than beta 1 and less than 1.3, beta 2 = beta 1+ beta 1 x (H-H2)/H is set,
If H is less than or equal to H1, the central control unit sets the dividing number of the video and audio according to the picture as an initialization component Na;
if H1 is more than H and less than or equal to H2, the central control unit sets the dividing number of the video and audio according to the picture as Na ', and sets Na' =na×β1;
if H > H2, the central control unit sets the division number of the video and audio according to the picture as Na ", sets Na" =na×β2,
the fifth preset condition is that the central control unit judges that the video and audio is divided into a plurality of areas based on the picture.
Further, the central control unit calculates a score value Z for time in the video and determines the division number of the video according to time, setting z=f×g+m×q+u×t, and setting f=mb according to the score value under a sixth preset condition -1 ,m＝s/Mb,u＝s -1 The central control unit is preset with a first time grading value Z1, a second time grading value Z2, a first regulating coefficient gamma 1 and a second regulating coefficient gamma 2, wherein Z1 is less than Z2,1 is less than gamma 1 and less than 1.2, gamma 2 = gamma 1+ gamma 1 x (Z-Z2)/Z,
if Z is less than or equal to Z1, the central control unit sets the dividing number of the video and audio according to time as an initialization component Nb;
If Z1 is greater than Z and less than or equal to Z2, the central control unit sets the number of divisions of the video and audio according to time as an initialization component Nb ', and sets Nb' =na×γ1;
if Z > Z2, the central control unit sets the number of divisions for the video-audio according to time as an initialization component Nb ", sets Nb" =nb×γ2,
the sixth preset condition is that the central control unit judges that the video and audio is divided into a plurality of local videos based on time.
Further, the central control unit simultaneously generates a plurality of data packets for the picture area and time, the central control unit adjusts Nc according to the total number of divisions N, the central control unit is provided with a first division number N1, a second division number N2, a first adjusting coefficient k1 and a second adjusting coefficient k2, wherein N1 is less than N2,1 is less than k1 is less than 1.1, k2=k1+k1× (N-N2)/N is set,
if N is less than or equal to N1, the central control unit sets the dividing number of the video and audio according to the picture area and time as an initialization component Nc;
if N1 is less than N and less than or equal to N2, the central control unit sets the division number of the video and audio according to the picture area and time as Nc ', and sets Nc' =nc×k1;
If N > N2, the central control unit sets nc″ for the number of divisions of the video and audio according to the picture area and time to nc″, and sets Nc "=nc×k2.
Compared with the prior art, the method has the beneficial effects that through the step S1, the receiving terminal selects the corresponding video and audio from the cloud platform, the identification terminal primarily identifies the corresponding basic parameters of the video and audio and sends the basic parameters to the central control unit, and the central control unit sets the transmission parameter standard for the video and audio according to the received basic parameters so as to improve the accuracy of the transmission parameters of the video and audio; through step S2, the central control unit determines the memory of the video according to the resolution and duration of the video, and primarily determines the transmission mode of the transmission unit for the video according to the memory, so as to improve the accuracy of the transmission mode of the video; through step S3, the central control unit periodically detects the transmission flow of the transmission unit for the video and audio when controlling the transmission unit to transmit the video and audio by using a direct transmission mode, and determines whether to adjust the transmission occupancy standard for the video and audio to a corresponding value or perform a packetizing transmission process on the video and audio according to the detected transmission flow, so as to improve the transmission precision of the video and audio and to improve the transmission stability of the video and audio; through step S4, when the central control unit completes adjustment of the transmission occupancy rate standard for the video and/or completes transmission processing of the sub-packets of the video and/or audio, the central control unit detects the transmission flow of the video and audio of the transmission unit in real time to determine whether to perform secondary adjustment of the transmission occupancy rate standard of the video and audio or not or whether to perform secondary transmission processing of the sub-packets of the video and audio until the video and audio is transmitted, so as to improve the transmission precision of the video and/or audio and improve the transmission stability of the video and audio.
In particular, the memory of the video and audio is calculated according to the duration of the video and the resolution of the video, and weight coefficients are respectively assigned to ensure the calculation accuracy of the memory of the video and audio.
In particular, the central control unit compares the obtained memory G of the video and the corresponding preset memory, and determines the transmission mode of the transmission unit for the video according to the comparison result, so as to improve the accuracy of the transmission mode of the video and the audio, thereby improving the stability of the video and the audio transmission.
Particularly, the transmission process of the video and audio is divided into a plurality of transmission periods by the central control unit under the first preset condition, the average transmission flow Qa of the video and audio in the transmission period of the transmission unit is detected by the central control unit according to a single transmission period, and whether the transmission flow of the video and audio in the transmission unit accords with the standard is judged according to the Qa, so that whether the transmission flow of the video and audio accords with the standard is ensured, and the stability of video and audio transmission is improved.
In particular, the central control unit increases the maximum occupancy C of the transmission unit for the video transmission to a corresponding value according to delta Qa under a second preset condition so as to ensure the accuracy of the maximum occupancy of the video transmission, thereby improving the stability of the video transmission.
In particular, the central control unit detects the maximum transmission flow Qamax of the transmission unit for the video and the minimum transmission flow Qamin of the transmission unit for the video in a single transmission period under a third preset condition, calculates the difference DeltaQ between Qamax and Qamin, and judges whether the transmission flow of the transmission unit in the transmission period fluctuates according to DeltaQ, so that the accuracy of the maximum occupancy rate of video transmission is ensured, and the stability of video transmission is improved.
Especially, the central control unit is used for sub-packaging transmission according to the difference delta G between G and G2 under the fourth preset condition, so that the accuracy of sub-packaging is ensured, and the stability of video and audio transmission is improved.
In particular, the central control unit calculates the regional grading value H of the picture in the video and the video according to the grading value to determine the dividing number of the picture in the video under the fifth preset condition so as to ensure the accuracy of the dividing number of the video and improve the stability of video transmission.
In particular, the central control unit calculates the grading value Z for the time in the video and audio under the sixth preset condition, and determines the dividing number of the video and audio according to the time according to the grading value, so that the accuracy of the dividing number of the video and audio is ensured, and the stability of video and audio transmission is improved.
In particular, a plurality of data packets are generated aiming at the picture area and the time through the central control unit so as to ensure the accuracy of the division quantity of the video and the audio, thereby improving the stability of video and audio transmission.
Drawings
Fig. 1 is a flow chart of a method for transmitting and playing adaptive video and audio according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Fig. 1 is a flow chart of a method for transmitting and playing adaptive video and audio, which discloses a method for transmitting and playing adaptive video and audio, according to an embodiment of the invention, comprising,
step S1, a receiving terminal selects a corresponding video from a cloud platform, an identification terminal primarily identifies corresponding basic parameters of the video and sends the basic parameters to a central control unit, the central control unit sets a transmission parameter standard for the video according to the received basic parameters, wherein the basic parameters in the video comprise resolution of the video and duration of the video, and the transmission parameter standard for the video comprises a transmission flow standard and a transmission occupancy standard;
Step S2, the central control unit determines the memory of the video and audio according to the resolution and the duration of the video and audio, and primarily determines the transmission mode of the transmission unit for the video and audio according to the memory;
step S3, the central control unit periodically detects the transmission flow of the transmission unit for the video and audio when controlling the transmission unit to transmit the video and audio in a direct transmission mode, and judges whether to adjust the transmission occupancy rate standard for the video and audio to a corresponding value or to perform sub-package transmission processing on the video and audio according to the detected transmission flow;
and S4, when the central control unit finishes adjusting the transmission occupancy rate standard of the video and the audio or video or finishing the sub-package transmission processing of the video and the audio, the central control unit detects the transmission flow of the video and the video of the transmission unit in real time to judge whether to secondarily adjust the transmission occupancy rate standard of the video and the video or secondarily sub-package transmission processing of the video and the video until the video and the video are transmitted.
Specifically, through step S1, the receiving terminal selects a corresponding video from the cloud platform, the identifying terminal primarily identifies corresponding basic parameters of the video and sends the basic parameters to the central control unit, and the central control unit sets a transmission parameter standard for the video according to the received basic parameters, so as to improve the accuracy of the transmission parameters of the video; through step S2, the central control unit determines the memory of the video according to the resolution and duration of the video, and primarily determines the transmission mode of the transmission unit for the video according to the memory, so as to improve the accuracy of the transmission mode of the video; through step S3, the central control unit periodically detects the transmission flow of the transmission unit for the video and audio when controlling the transmission unit to transmit the video and audio by using a direct transmission mode, and determines whether to adjust the transmission occupancy standard for the video and audio to a corresponding value or perform a packetizing transmission process on the video and audio according to the detected transmission flow, so as to improve the transmission precision of the video and audio and to improve the transmission stability of the video and audio; through step S4, when the central control unit completes adjustment of the transmission occupancy rate standard for the video and/or completes transmission processing of the sub-packets of the video and/or audio, the central control unit detects the transmission flow of the video and audio of the transmission unit in real time to determine whether to perform secondary adjustment of the transmission occupancy rate standard of the video and audio or not or whether to perform secondary transmission processing of the sub-packets of the video and audio until the video and audio is transmitted, so as to improve the transmission precision of the video and/or audio and improve the transmission stability of the video and audio.
Specifically, in the step S2, the central control unit marks the memory of the video and audio as G, and sets g=a×t+b×p 2 Wherein a is a first weight coefficient, a=0.55 Mb/s is set, b is a second weight coefficient, b=0.45 Mb/Pt is set 2 T is the duration of the video, and P is the resolution of the video.
Specifically, the embodiment of the invention calculates the memory of the video and audio through the duration of the video and the resolution of the video, and respectively assigns weight coefficients to ensure the calculation accuracy of the memory of the video and audio.
Specifically, in the step S3, the central control unit compares the obtained memory G of the video and the corresponding preset memory G, determines the transmission mode of the transmission unit for the video and the audio according to the comparison result, and sets a first preset memory G1 and a second preset memory G2 in the central control unit, wherein G1 is smaller than G2,
if G is less than or equal to G1, the central control unit judges and controls the transmission unit to transmit the video and audio to the receiving terminal in a direct transmission mode;
if G1 is more than G and less than or equal to G2, the central control unit preliminarily judges that the transmission unit is controlled to transmit the video and audio to the receiving terminal in a direct transmission mode, the central control unit periodically detects the average transmission flow Qa of the transmission unit for the video and audio in the process of transmitting the video and audio by the transmission unit, and judges whether to control the transmission unit to perform sub-package transmission processing on the video and audio according to the Qa;
If G is more than G2, the central control unit judges and controls the transmission unit to transmit the video and audio to the receiving terminal in a sub-packet transmission mode, and further judges the sub-packet mode aiming at the video and audio according to the basic parameters of the video and audio.
Specifically, the embodiment of the invention compares the obtained memory G of the video and the corresponding preset memory through the central control unit, and determines the transmission mode of the transmission unit aiming at the video according to the comparison result, so as to improve the accuracy of the transmission mode of the video and the audio, thereby improving the stability of the video and the audio transmission.
Specifically, the central control unit divides the transmission process of the video and audio into a plurality of transmission periods under a first preset condition, and detects the average transmission flow Qa of the video and audio in the transmission period according to the single transmission period, and judges whether the transmission flow of the video and audio in the transmission unit accords with the standard according to the Qa, the central control unit is provided with a first preset transmission flow Qa1 and a second preset transmission flow Qa2, wherein Qa1 is smaller than Qa2,
if Qa is less than or equal to Qa1, the central control unit determines that the transmission flow of the video and audio by the transmission unit in the period does not meet a preset standard, the central control unit calculates a difference delta Qa between Qa1 and Qa and adjusts the maximum occupancy rate C of the transmission unit for the video and audio transmission to a corresponding value according to delta Qa, and delta qa=qa1-Qa is set;
If Qa1 is more than Qa and less than or equal to Qa2, the central control unit preliminarily judges that transmission fluctuation occurs in the transmission process of the video and audio by the transmission unit, the central control unit detects the maximum transmission flow Qamax and the minimum transmission flow Qamin of the transmission unit in the transmission period, and further judges whether the transmission process of the video and audio by the transmission unit accords with a preset standard according to Qamax and Qamin;
if Qa is more than Qa2, the central control unit determines that the transmission flow of the video and audio in the period of the transmission unit accords with a preset standard;
the first preset condition is that the central control unit judges that the memory G of the video and audio meets G1 & ltG & gtG 2.
Specifically, the embodiment of the invention divides the transmission process of the video and audio into a plurality of transmission periods under a first preset condition by the central control unit, detects the average transmission flow Qa of the video and audio in the transmission period by the transmission unit according to a single transmission period, and judges whether the transmission flow of the video and audio in the transmission unit accords with the standard according to the Qa so as to ensure the accuracy of whether the transmission flow of the video and audio accords with the standard, thereby improving the stability of video and audio transmission.
Specifically, the central control unit increases the maximum occupancy rate C of the transmission unit for the video and audio transmission to a corresponding value according to DeltaQa under a second preset condition, a first preset transmission flow difference DeltaQa 1 and a second preset transmission flow difference DeltaQa 2 are arranged in the central control unit, deltaQa 1 < DeltaQa2,
if delta Qa is less than or equal to delta Qa1, the central control unit does not adjust the maximum occupancy C of the transmission unit for the video and audio transmission;
if delta Qa1 is less than delta Qa2, the central control unit selects a first occupancy rate adjustment coefficient alpha 1 to increase the maximum occupancy rate C of the transmission unit for the video transmission to a corresponding value, and 1 < alpha 1 < 1.2 is set;
if Δqa > - Δqa2, the central control unit selects a second occupancy adjustment coefficient α2 to increase the maximum occupancy C of the transmission unit for the video transmission to a corresponding value, and sets α2=α1× (2- Δqa2/Δqa);
when the central control unit selects an ith occupancy rate adjustment coefficient alpha i to adjust the maximum occupancy rate C of the video and audio transmission by the transmission unit, setting i=1 and 2, setting the maximum occupancy rate of the adjusted transmission unit as C ', and setting C' =C×alpha i;
The second preset condition is that the central control unit judges that the memory G of the video and audio meets G & gtG 2.
Specifically, the embodiment of the invention increases the maximum occupancy C of the transmission unit for the video and audio transmission to the corresponding value according to delta Qa under the second preset condition by the central control unit so as to ensure the accuracy of the maximum occupancy of the video and audio transmission, thereby improving the stability of the video and audio transmission.
Specifically, the central control unit detects the maximum transmission flow Qamax of the transmission unit for the video and the minimum transmission flow Qamin of the transmission unit for the video in a single transmission period under a third preset condition, calculates the difference DeltaQ between Qamax and Qamin, judges whether the transmission flow of the transmission unit in the transmission period fluctuates according to DeltaQ, the central control unit is provided with a preset transmission flow critical difference DeltaQ 0,
if DeltaQ > DeltaQ0, the central control unit judges that the transmission flow of the transmission unit in the transmission period fluctuates, the central control unit selects a first occupancy rate correction coefficient j1 to correct the maximum occupancy rate C of the transmission unit for the video and audio transmission so as to reduce C to a corresponding value, and the value of C is set to be 0.83 < j1 < 1;
If delta Q is less than or equal to delta Q0, the central control unit judges that the transmission flow of the transmission unit in the transmission period does not fluctuate, and judges that the transmission flow of the transmission unit in the period for the video and audio does not accord with a preset standard, the central control unit selects a second occupancy rate correction coefficient j2 to correct the maximum occupancy rate C of the transmission unit for the video and audio transmission so as to increase C to a corresponding value, and the value of 1 < j2 < 1.3 is set;
the central control unit selects an x-th occupancy rate correction coefficient jx to correct the maximum occupancy rate of the adjusted transmission unit to be C ', x=1 and 2 are set, the maximum occupancy rate of the corrected transmission unit for video and audio transmission is set to be C ', and C ' =C multiplied by jx is set;
the third preset condition is that the average transmission flow Qa of the video and audio in a single transmission period of the transmission unit meets Qa1 < Qa less than or equal to Qa2.
Specifically, the embodiment of the invention detects the maximum transmission flow Qamax of the transmission unit for the video and the minimum transmission flow Qamin of the transmission unit for the video in a single transmission period under a third preset condition, the central control unit calculates the difference DeltaQ between Qamax and Qamin and judges whether the transmission flow of the transmission unit in the transmission period fluctuates according to DeltaQ so as to ensure the accuracy of the maximum occupancy rate of video transmission, thereby improving the stability of video transmission.
Specifically, the central control unit performs sub-packet transmission according to the difference Δg between G and G2 under a fourth preset condition, and sets Δg=g-G2, wherein the central control unit is preset with a first memory difference Δg1 and a second memory difference Δg2,
the delta G is less than or equal to delta G1, the central control unit judges that the video and audio is divided into a plurality of local videos by taking time as a standard, and a plurality of data packets aiming at the corresponding local videos are sequentially generated;
the delta G1 is less than or equal to delta G2, and the central control unit judges that the video and audio video is divided into a plurality of local videos by taking time as a standard so as to form a plurality of data packets;
the delta G > -delta G2, wherein the central control unit judges that the video and audio frequency is divided into a plurality of local videos by taking time as a standard so as to form a plurality of data packets;
and the fourth preset condition is that the central control unit judges that the memory G of the video and audio meets G & gtG 2.
Specifically, the embodiment of the invention carries out the sub-packaging transmission according to the difference DeltaG between G and G2 under the fourth preset condition by the central control unit so as to ensure the accuracy of the sub-packaging, thereby improving the stability of video transmission.
Specifically, the central control unit calculates a region score H for a picture in the video and determines the division number of the picture in the video according to the score H, and sets h=d×g+e×p, where d is a first weight coefficient, and d=0.42 Mb -1 ，e＝0.58Pt -1 ,
The central control unit is provided with a first region score value H1, a second region score value H2, a first adjustment coefficient beta 1 and a second adjustment coefficient beta 2, wherein H1 is less than H2,1 is less than beta 1 and less than 1.3, beta 2 = beta 1+ beta 1 x (H-H2)/H is set,
if H is less than or equal to H1, the central control unit sets the dividing number of the video and audio according to the picture as an initialization component Na;
if H1 is more than H and less than or equal to H2, the central control unit sets the dividing number of the video and audio according to the picture as Na ', and sets Na' =na×β1;
if H > H2, the central control unit sets the division number of the video and audio according to the picture as Na ", sets Na" =na×β2,
the fifth preset condition is that the central control unit judges that the video and audio is divided into a plurality of areas based on the picture.
Specifically, the embodiment of the invention calculates the regional grading value H of the picture in the video and audio through the central control unit under the fifth preset condition and determines the dividing number of the picture in the video and audio according to the grading value so as to ensure the accuracy of the dividing number of the video and audio, thereby improving the stability of video and audio transmission.
Specifically, the central control unit calculates a score value Z for time in the video and determines the number of divisions of the video according to time, setting z=f×g+m×q+u×t, and setting f=mb according to the score value under a sixth preset condition -1 ,m＝s/Mb,u＝s -1 The central control unit is preset with a first time grading value Z1, a second time grading value Z2, a first regulating coefficient gamma 1 and a second regulating coefficient gamma 2, wherein Z1 is less than Z2,1 is less than gamma 1 and less than 1.2, gamma 2 = gamma 1+ gamma 1 x (Z-Z2)/Z,
if Z is less than or equal to Z1, the central control unit sets the dividing number of the video and audio according to time as an initialization component Nb;
if Z1 is greater than Z and less than or equal to Z2, the central control unit sets the number of divisions of the video and audio according to time as an initialization component Nb ', and sets Nb' =na×γ1;
if Z > Z2, the central control unit sets the number of divisions for the video-audio according to time as an initialization component Nb ", sets Nb" =nb×γ2,
the sixth preset condition is that the central control unit judges that the video and audio is divided into a plurality of local videos based on time.
Specifically, in the embodiment of the invention, the central control unit calculates the grading value Z for the time in the video and audio under the sixth preset condition, and determines the dividing number of the video and audio according to the time according to the grading value, so that the accuracy of the dividing number of the video and audio is ensured, and the stability of video and audio transmission is improved.
Specifically, the central control unit simultaneously generates a plurality of data packets for a picture area and time, adjusts Nc according to the total number of divisions N, is provided with a first division number N1, a second division number N2, a first adjustment coefficient k1 and a second adjustment coefficient k2, wherein N1 is less than N2,1 is less than k1 is less than 1.1, k2=k1+k1× (N-N2)/N is set,
if N is less than or equal to N1, the central control unit sets the dividing number of the video and audio according to the picture area and time as an initialization component Nc;
if N1 is less than N and less than or equal to N2, the central control unit sets the division number of the video and audio according to the picture area and time as Nc ', and sets Nc' =nc×k1;
if N > N2, the central control unit sets nc″ for the number of divisions of the video and audio according to the picture area and time to nc″, and sets Nc "=nc×k2.
Specifically, the embodiment of the invention simultaneously generates a plurality of data packets aiming at the picture area and the time through the central control unit so as to ensure the accuracy of the division quantity of the video and the audio, thereby improving the stability of video and audio transmission.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (6)
1. A self-adaptive video and audio transmission playing method is characterized by comprising the following steps of,
step S1, a receiving terminal selects a corresponding video from a cloud platform, an identification terminal primarily identifies corresponding basic parameters of the video and sends the basic parameters to a central control unit, the central control unit sets a transmission parameter standard for the video according to the received basic parameters, wherein the basic parameters in the video comprise resolution of the video and duration of the video, and the transmission parameter standard for the video comprises a transmission flow standard and a maximum transmission occupancy rate;
step S2, the central control unit determines the memory of the video and audio according to the resolution and the duration of the video and audio, and primarily determines the transmission mode of the transmission unit for the video and audio according to the memory;
the central control unit compares the obtained memory G of the video and audio with a corresponding preset memory, determines the transmission mode of the transmission unit aiming at the video and audio according to the comparison result, the central control unit is provided with a first preset memory G1 and a second preset memory G2, wherein G1 is smaller than G2,
if G is less than or equal to G1, the central control unit judges and controls the transmission unit to transmit the video and audio to the receiving terminal in a direct transmission mode;
If G1 is smaller than G and smaller than G2, the central control unit preliminarily judges that the transmission unit is controlled to transmit the video and audio to the receiving terminal in a direct transmission mode, the central control unit periodically detects the average transmission flow Qa of the transmission unit for the video and audio in the process of transmitting the video and audio by the transmission unit, and judges whether the transmission flow of the transmission unit for the video and audio accords with a standard according to the Qa;
if G is more than G2, the central control unit judges and controls the transmission unit to transmit the video and audio to the receiving terminal in a sub-packet transmission mode, and further judges the sub-packet mode aiming at the video and audio according to the basic parameters of the video and audio;
step S3, the central control unit periodically detects the transmission flow of the transmission unit for the video and audio when controlling the transmission unit to transmit the video and audio in a direct transmission mode, and judges whether to adjust the maximum transmission occupancy rate for the video and audio to a corresponding value or to perform sub-packet transmission processing on the video and audio according to the detected transmission flow;
the central control unit divides the transmission process of the video and audio into a plurality of transmission periods under a first preset condition, the central control unit detects the average transmission flow Qa of the transmission unit for the video and audio in the transmission period and audio and video according to the Qa, judges whether the transmission flow of the transmission unit for the video and audio accords with the standard, the central control unit is provided with a first preset transmission flow Qa1 and a second preset transmission flow Qa2, wherein, qa1 is less than Qa2,
If Qa is less than or equal to Qa1, the central control unit determines that the transmission flow of the video and audio by the transmission unit in the period does not meet a preset standard, the central control unit calculates a difference delta Qa between Qa1 and Qa and adjusts the maximum occupancy rate C of the transmission unit for the video and audio transmission to a corresponding value according to delta Qa, and delta qa=qa1-Qa is set;
if Qa1 is more than Qa and less than or equal to Qa2, the central control unit preliminarily judges that transmission fluctuation occurs in the transmission process of the video and audio by the transmission unit, the central control unit detects the maximum transmission flow Qamax and the minimum transmission flow Qamin of the transmission unit in the transmission period, and further judges whether the transmission process of the video and audio by the transmission unit accords with a preset standard according to Qamax and Qamin;
if Qa is more than Qa2, the central control unit determines that the transmission flow of the video and audio in the period of the transmission unit accords with a preset standard;
the first preset condition is that the central control unit judges that the memory G of the video and audio meets G1 & ltG & gtG 2;
and S4, when the central control unit finishes adjusting the maximum occupancy rate of the video and audio transmission or finishing the sub-packaging transmission processing of the video and audio, the central control unit detects the transmission flow of the video and audio of the transmission unit in real time to judge whether to secondarily adjust the maximum occupancy rate of the video and audio transmission or to secondarily sub-packaging the video and audio until the video and audio transmission is finished.
2. The adaptive video and audio transmission playing method according to claim 1, wherein in the step S2, the central control unit will target the video and audioThe memory of the video is denoted as G, and g=a×t+b×p is set 2 Wherein a is a first weight coefficient, a=0.55 Mb/s is set, b is a second weight coefficient, b=0.45 Mb/P is set 2 T is the duration of the video, and P is the resolution of the video.
3. The method of claim 2, wherein the detecting, by the central control unit, the maximum transmission flow Qamax and the minimum transmission flow Qamin of the transmission unit in the transmission period, and further determining whether the transmission process of the video and audio by the transmission unit meets a preset standard according to the Qamax and the Qamin includes: the central control unit detects the maximum transmission flow Qamax of the transmission unit for the video and the minimum transmission flow Qamin of the transmission unit for the video in a single transmission period under a third preset condition, calculates the difference DeltaQ between Qamax and Qamin, judges whether the transmission flow of the transmission unit in the transmission period fluctuates according to DeltaQ, the central control unit is provided with a preset transmission flow critical difference DeltaQ 0,
If DeltaQ > DeltaQ0, the central control unit judges that the transmission flow of the transmission unit in the transmission period fluctuates, the central control unit selects a first occupancy rate correction coefficient j1 to correct the maximum occupancy rate C of the transmission unit for the video and audio transmission so as to reduce C to a corresponding value, and the value of C is set to be 0.83 < j1 < 1;
if delta Q is less than or equal to delta Q0, the central control unit judges that the transmission flow of the transmission unit in the transmission period does not fluctuate, and judges that the transmission flow of the transmission unit in the period for the video and audio does not accord with a preset standard, the central control unit selects a second occupancy rate correction coefficient j2 to correct the maximum occupancy rate C of the transmission unit for the video and audio transmission so as to increase C to a corresponding value, and the value of 1 < j2 < 1.3 is set;
the central control unit selects an x-th occupancy rate correction coefficient jx to correct the maximum occupancy rate of the adjusted transmission unit to be C ', x=1 and 2 are set, the maximum occupancy rate of the corrected transmission unit for video and audio transmission is set to be C ', and C ' =C multiplied by jx is set;
the third preset condition is that the average transmission flow Qa of the video and audio in a single transmission period of the transmission unit meets Qa1 < Qa less than or equal to Qa2.
4. The adaptive video and audio transmission playing method according to claim 3, wherein the central control unit calculates an area scoring value H for a picture in the video and determines a division number for the video and audio according to the scoring value, and sets h=d×g+e×p, where d is a first weight coefficient, and d=0.42 Mb -1 ，e=0.58P -1 ,
The central control unit is provided with a first region score value H1, a second region score value H2, a first adjustment coefficient beta 1 and a second adjustment coefficient beta 2, wherein H1 is less than H2,1 is less than beta 1 and less than 1.3, beta 2 = beta 1+ beta 1 x (H-H2)/H is set,
if H is less than or equal to H1, the central control unit sets the dividing number of the video and audio according to the picture as an initialization component Na;
if H1 is more than H and less than or equal to H2, the central control unit sets the dividing number of the video and audio according to the picture as Na ', and sets Na' =na×β1;
if H > H2, the central control unit sets the division number of the video and audio according to the picture as Na ", sets Na" =na×β2,
the fifth preset condition is that the central control unit judges that the video and audio is divided into a plurality of areas based on the picture.
5. The method according to claim 4, wherein the central control unit calculates a score Z for time in the video under a sixth preset condition and determines the number of divisions of the video according to time based on the score, sets z=f×g+m×qa+u×t, and sets f=mb -1 ,m=s/Mb,u=s -1 The central control unit is preset with a first time grading value Z1, a second time grading value Z2 and a first adjustmentA coefficient γ1 and a second adjustment coefficient γ2, wherein Z1 < Z2, 1 < γ1 < 1.2, γ2=γ1+γ1× (Z-Z2)/Z, wherein,
if Z is less than or equal to Z1, the central control unit sets the dividing number of the video and audio according to time as an initialization component Nb;
if Z1 is greater than Z and less than or equal to Z2, the central control unit sets the number of divisions of the video and audio according to time as an initialization component Nb ', and sets Nb' =na×γ1;
if Z > Z2, the central control unit sets the number of divisions for the video-audio according to time as an initialization component Nb ", sets Nb" =nb×γ2,
the sixth preset condition is that the central control unit judges that the video and audio is divided into a plurality of local videos based on time.
6. The adaptive video and audio transmission playing method according to claim 5, wherein the central control unit generates several data packets for the picture area and time at the same time, the central control unit adjusts Nc according to the total number of divisions N, the central control unit is provided with a first division number N1, a second division number N2, a first adjustment coefficient k1 and a second adjustment coefficient k2, wherein N1 < N2,1 < k1 < 1.1, k2=k1+k1× (N-N2)/N is set,
if N is less than or equal to N1, the central control unit sets the dividing number of the video and audio according to the picture area and time as an initialization component Nc;
if N1 is less than N and less than or equal to N2, the central control unit sets the division number of the video and audio according to the picture area and time as Nc ', and sets Nc' =nc×k1;
if N > N2, the central control unit sets nc″ for the number of divisions of the video and audio according to the picture area and time to nc″, and sets Nc "=nc×k2.
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