CN107959874B - Method and device for automatically correcting sound and picture synchronization - Google Patents
Method and device for automatically correcting sound and picture synchronization Download PDFInfo
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- CN107959874B CN107959874B CN201711320995.XA CN201711320995A CN107959874B CN 107959874 B CN107959874 B CN 107959874B CN 201711320995 A CN201711320995 A CN 201711320995A CN 107959874 B CN107959874 B CN 107959874B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
Abstract
The invention discloses a sound and picture synchronization automatic correction method, which is applied to a television terminal and comprises the following steps: comparing whether the frame rate of the current network film source is the same as the frame rate of the last detected network film source; if so, keeping the sound delay time value corresponding to the adjusted sound and picture synchronous parameter value in the UI unchanged; if not, adjusting the sound delay time value, so that the adjusted sound delay time value is matched with the frame rate of the current network film source under the condition of keeping the sound and picture synchronization parameter value unchanged. The problem of among the prior art corresponding diversified network film sources of frame rate, when carrying out sound and picture synchronization's adjustment, can cause the user to need frequently adjust the parameter that the sound delays, user experience is relatively poor is solved, and then lead to causing the puzzlement to the viewer, realized that the terminal can carry out the settlement of sound and picture synchronization parameter to the network film source of every frame rate automatically.
Description
Technical Field
The invention relates to the field of sound and image processing, in particular to a sound and picture synchronous automatic correction method and device.
Background
With the rapid development and popularization of internet televisions, users watch more and more scenes of network videos, and meanwhile, the formats of network video film sources are diversified. Due to the difference of the film source formats, the effect of the sound-picture synchronization will also be different, such as: the network film source playing 1080p 60HZ and the network film source playing 1080p 30HZ have different sound and picture synchronization effects.
The main reason why different formats of network video sources cause the audio and video asynchronization is that the audio and video asynchronization is further caused by different frame rates (FrameRate) of the sources and different buffer processing mechanisms of the master chip (SOC) for the video, for example: for a 1080p 30HZ film source: if the SOC video buffering mechanism is buffering 1 frame, the image is 1000/30 × 1=33.3ms slower than the sound; if the SOC video buffering mechanism is to buffer 2 frames, the image is 1000/30 × 2=66.6ms slower than the sound. For a 1080p 60HZ film source: if the SOC video buffering mechanism is buffering 1 frame, the image is 1000/60 × 1=16.6ms slower than the sound; if the SOC video buffering mechanism is to buffer 2 frames, the image is 1000/60 × 2=33.3ms slower than the sound.
In order to solve the above problems, the current smart tv generally provides a configuration interface for adjusting the sound delay for the user, and the user adjusts the configuration interface according to the actual situation, as shown in fig. 1.
However, this method has certain problems, such as: when a user watches a 1080p 60HZ network film source, the sound delay is manually adjusted to 3, so that the effect of sound and picture synchronization is achieved; however, the user changes a network film source of 1080p 30HZ, the original sound delay adjustment value is no longer suitable for the current scene, and in order to meet the watching effect, the sound delay may need to be readjusted to achieve the same sound and picture synchronization effect, so that when the sound and picture synchronization is adjusted, the user needs to frequently adjust the sound delay parameters corresponding to the network film source with diversified frame rates, and the user experience is poor.
Disclosure of Invention
The embodiment of the application provides a method and a device for automatically correcting sound and picture synchronization, and solves the problems that in the prior art, when sound and picture synchronization is adjusted, a user needs to frequently adjust sound delay parameters and experiences poor quality, and further a trouble is caused to a viewer, and the terminal can automatically set the sound and picture synchronization parameters for network film sources with various frame rates.
On one hand, the embodiment of the application provides a sound and picture synchronization automatic correction method, which is applied to a television terminal, and the method comprises the following steps:
comparing whether the frame rate of the current network film source is the same as the frame rate of the last detected network film source;
if so, keeping the sound delay time value corresponding to the adjusted sound and picture synchronous parameter value in the UI unchanged;
if not, adjusting the sound delay time value, so that the adjusted sound delay time value is matched with the frame rate of the current network film source under the condition of keeping the sound and picture synchronization parameter value unchanged.
On the other hand, the embodiment of the present application further provides an automatic sound-picture synchronization correction device, which is applied to a television terminal, and the device includes:
the comparison unit is used for comparing whether the frame rate of the current network film source is the same as the frame rate of the network film source detected at the previous time or not;
the holding unit is used for keeping the sound delay time value corresponding to the adjusted sound and picture synchronous parameter value in the UI unchanged if the adjusted sound and picture synchronous parameter value is in the UI state;
and if not, adjusting the sound delay time value to enable the adjusted sound delay time value to be matched with the frame rate of the current network film source under the condition of keeping the sound and picture synchronization parameter value unchanged.
Compared with the prior art, the invention can know whether the frame rate of the current network film source is changed before comparing by the television terminal through comparing the frame rate of the current network film source with the frame rate of the network film source detected last time, if not, the sound-picture synchronization parameter set for the UI interface in the previous detection can still be adopted, the sound delay time value is not changed at the moment, but if the frame rate is changed, the television terminal can carry out data correction on the sound delay time value, adjust the sound delay time value, further refresh the sound delay data, the user can not find that the sound-picture synchronization parameter set for the UI interface is changed, but the sound delay time value corresponding to the sound-picture synchronization parameter set for the UI interface is changed, and is matched with the frame rate of the current network film source, so that the user can not find that the sound-picture synchronization parameter of the television is modified, however, the sound delay time is adjusted in the background, and the actual sound delay time heard by the user changes and is matched with the frame rate of the current network film source, so that frequent adjustment of sound and picture synchronization parameter values by the user can be avoided, and the user experience is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram illustrating a user-provided effect of adjusting a synchronized display of sound and pictures in the related art according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for automatic correction of audio-visual synchronization described in the embodiments of the present application;
FIG. 3 is a block diagram of an apparatus for automatic correction of audio-visual synchronization described in the embodiments of the present application;
fig. 4 is a schematic structural diagram of a processing unit and a storage unit of a sound-picture synchronization automatic correction device described in the embodiments of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In the related art, when a code stream of an image or a video is received, caption data corresponding to audio data may be further included in the code stream, and accordingly, by parsing the caption data, a plurality of control words of the CC, for example, a line number, a character size, a line interval size, a character display window size, and the like of a caption corresponding to an audio file, may be obtained.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 2, an embodiment of the present application provides a method for automatically correcting audio and video synchronization, which is applied to a television terminal, and the method includes:
step S101, comparing whether the frame rate of the current network film source is the same as the frame rate of the last detected network film source;
step S102, if yes, keeping the sound delay time value corresponding to the adjusted sound and picture synchronous parameter value in the UI unchanged;
and step S103, if not, adjusting the sound delay time value, so that the adjusted sound delay time value is matched with the frame rate of the current network film source under the condition of keeping the sound and picture synchronization parameter value unchanged.
For a tv terminal, frame rates (FrameRate) of network film sources are various due to no unified operator control, for example, a movie source frame rate of 24HZ is common, and video film sources with frame rates of 30HZ, 50HZ and 60HZ are common, and such different frame rates may cause the network video film source to be out of sync with sound and picture. Although the frame rate is not the only reason for the audio-video asynchronization, for example, the audio-video asynchronization may be caused because the main chips (SOCs) of different televisions have different video caching mechanisms, the processing performance of the main chip of the television may be assumed to be unchanged based on the same television, and in the embodiment of the present application, only a solution to the audio-video asynchronization caused by the frame rate problem is provided.
In the related art, a UI interface for adjusting sound delay is provided for a user in a television terminal, as shown in fig. 1, each sound and picture synchronization parameter value configured on the UI interface corresponds to a time value for sound delay, and adjusting the sound and picture synchronization parameter value obtains different time values for sound delay, so that the sound and picture synchronization effect is finally achieved.
The core idea of the application is that, for the sound and picture synchronization parameter value that has been adjusted by the user, if the frame rate of the network film source changes, the user does not need to adjust the sound and picture synchronization parameter value again, but the sound delay time value corresponding to the current sound and picture synchronization parameter value is modified, for example, before the frame rate of the network film source is switched, the sound and picture synchronization parameter value set by the user is 3, assuming that the sound delay time value corresponding to the parameter 3 is 33.3ms, if the frame rate of the network film source is switched later, the sound and picture synchronization parameter value set by the user is still 3, and does not change, but the sound delay time value corresponding to the parameter 3 at this time is modified and adjusted, for example, the sound delay time value corresponding to the parameter 3 at this time is 66.6ms, so that the user does not perceive that the sound and picture synchronization parameter value changes, but the television has modified the sound delay time value corresponding to the sound and picture synchronization parameter value at the background, so that the sound and the picture are synchronized.
For the above example that the frame rate of the film source is 60HZ during the detection, the basic idea of the present application can be summarized as follows:
1. acquiring the frame rate of a network video film source in real time and the frame rate (60 HZ) of the film source at the last detection time stored by a television;
2. detecting whether the frame rate of the current network video film source is consistent with the frame rate of the last film source in real time, namely whether the frame rate is changed;
3. if the frame rate is not changed, the related setting of the sound delay time value is kept unchanged;
4. if the frame rate is changed, data calculation is carried out according to the data correction module;
5. and refreshing the related setting of the sound delay time value according to the calculated data to enable the sound delay time value to take effect.
In the whole process, the user-configured sound-picture synchronization parameter value in the UI interface visible to the user is not changed.
Further, before comparing whether the frame rate of the current network slice source is the same as the frame rate of the last detected network slice source, the method further includes:
and reading the frame rate of the current network film source and the frame rate of the network film source detected in the previous time period once every a preset time period.
In practice, besides the mode of every preset time period, the frame rate may also be detected once every time a slice source is switched to see whether a change occurs, because in the same slice source, the possibility of suddenly switching the frame rate is low, the time for actually detecting the frame rate of the slice source may be preset by a user, or a developer plans in a software design stage, and the specific mode is not limited herein.
Further, the step of adjusting the sound delay time value specifically includes:
if the frame rate of the current network film source is greater than the frame rate of the last detected network film source, reducing the reference value of sound delay according to the difference value between the frame rate of the last detected network film source and the frame rate of the current network film source and the number of cache frames of the main chip;
if the frame rate of the current network film source is less than the frame rate of the last detected network film source, increasing a reference value of sound delay according to the difference value between the frame rate of the current network film source and the frame rate of the last detected network film source and the number of cache frames of a main chip;
and the reference value of the sound delay is the time value of the sound delay corresponding to the network video source frame rate detected last time when the sound picture synchronization parameter value is not adjusted.
The following provides a relevant description of the above steps in a specific data calculation manner.
1) Obtaining the frame rate R value of the current network film source
2) The last time of detection, the obtained network film source frame rate is 60HZ (60 HZ is used as standard reference)
Main chip buffer frame number F: f is a known fixed value (F value may be different depending on the processing master chip of the master chip)
Sound delay time adjustable range: 0- - -M (ms), M being a known fixed value (M value may be different depending on the processing master chip of the master chip)
User adjustment range: 0-N, where N is a fixed value, and is determined according to UI interaction design, for example, currently N =10 is set, that is, as shown in fig. 1, the adjustment range of the sound-picture synchronization parameter value is 0-10.
Reference value s (ms) of sound delay: the time of sound delay when the sound picture synchronous parameter value is not adjusted when S is 60HZ film source
User adjustment step length D: d = (M-S)/N, wherein S corresponds to a user and sets a sound and picture synchronization parameter value 0; m sets sound and picture synchronous parameter value N corresponding to user
3) Acquiring 60HZ related data from a database;
the method comprises the following steps: f value, M value, N value, S value, D value
4) Acquiring data adjusted by a user in a UI;
assume that the user adjusts in the UI to a value of X (0. ltoreq. X. ltoreq.N)
5) Comparing the obtained current frame rate with 60HZ
6) If the current frame rate R value is less than 60HZ, increasing the reference value of sound delay;
new reference value S0= S + (1000/R-1000/60) × F
The step D value remains unchanged.
7) If the current frame rate R value is larger than 60HZ, reducing the reference value of sound delay;
new reference value S0= S- (1000/60-1000/R) × F
The step D value remains unchanged.
8) If the current frame rate R is equal to 60HZ, the reference value of the sound delay is not changed
The reference value S0= S, the step length D and the user N are all kept unchanged
Further, if the frame rate of the current network slice source is greater than the frame rate of the last detected network slice source, the method reduces the reference value of the sound delay, and then further includes:
calculating a sound delay time value after a reference value for reducing the sound delay;
correspondingly, if the frame rate of the current network slice source is less than the frame rate of the last detected network slice source, increasing the reference value of the sound delay, and then further comprising:
a sound delay time value after increasing the reference value of the sound delay is calculated.
Further, the sound delay time value is calculated by the following steps, including:
and calculating the sound delay time value matched with the frame rate of the current network film source according to the sound picture synchronization parameter value in the current UI interface, the preset user adjustment step length and the sound delay reference value.
Illustratively, corresponding to the step of adjusting the sound delay time value, the method further comprises:
9) and matching corresponding data by combining the adjusted reference value of the sound delay and the sound picture synchronization parameter value adjusted by the user in the UI interface, namely calculating according to the corrected reference value S0 and the user UI adjustment value.
10) Through the steps, the actual sound delay value is obtained
The actual sound delay time value is S0+ D X.
Therefore, in conjunction with the above description of the steps, it can be known that the actual sound delay value may change with the change of the slice source frame rate. Compared with the prior art, the invention can learn whether the frame rate of the current network film source is changed before comparing with the frame rate of the last detected network film source by the television terminal, if not, the sound and picture synchronization parameter set for the UI interface in the last detection can still be adopted, the sound delay time value is not changed at the moment, but if the frame rate is changed, the television terminal can carry out data correction on the sound delay time value, adjust the sound delay time value and further refresh the sound delay data, a user can not find that the sound and picture synchronization parameter set for the UI interface is changed, but the sound delay time value corresponding to the sound and picture synchronization parameter set for the UI interface is changed, the frame rate is matched with the frame rate of the current network film source, so that the user can not find that the sound and picture synchronization parameter of the television is modified, but the sound delay time can be adjusted later, the actual sound delay time heard by the user changes and is matched with the frame rate of the current network film source, so that frequent adjustment of sound and picture synchronization parameter values by the user can be avoided, and the user experience is improved.
Based on the above-described inventive concept, an embodiment of the present application further provides an automatic sound-picture synchronization correction apparatus, applied in a television terminal, as shown in fig. 3, the apparatus includes:
a comparing unit 301, configured to compare whether a frame rate of a current network slice source is the same as a frame rate of a network slice source detected at a previous time;
a holding unit 302, configured to, if yes, keep a sound delay time value corresponding to the adjusted sound-picture synchronization parameter value in the UI interface unchanged;
if not, the adjusting unit 303 is configured to adjust the sound delay time value, so that the adjusted sound delay time value matches the frame rate of the current network film source while keeping the sound-picture synchronization parameter value unchanged.
Further, the apparatus further comprises:
and the periodic reading unit is used for reading the frame rate of the current network film source and the frame rate of the network film source detected in the previous time period once every preset time period.
Further, the adjusting unit is specifically configured to:
if the frame rate of the current network film source is greater than the frame rate of the last detected network film source, reducing the reference value of sound delay according to the difference value between the frame rate of the last detected network film source and the frame rate of the current network film source and the number of cache frames of the main chip;
if the frame rate of the current network film source is less than the frame rate of the last detected network film source, increasing a reference value of sound delay according to the difference value between the frame rate of the current network film source and the frame rate of the last detected network film source and the number of cache frames of a main chip;
and the reference value of the sound delay is the time value of the sound delay corresponding to the network video source frame rate detected last time when the sound picture synchronization parameter value is not adjusted.
Further, the apparatus further comprises:
a calculation unit for calculating a sound delay time value after decreasing the reference value of the sound delay or calculating a sound delay time value after increasing the reference value of the sound delay.
Further, the computing unit is specifically configured to:
and calculating the sound delay time value matched with the frame rate of the current network film source according to the sound picture synchronization parameter value in the current UI interface, the preset user adjustment step length and the sound delay reference value.
Compared with the prior art, the invention can learn whether the frame rate of the current network film source is changed before comparing with the frame rate of the last detected network film source by the television terminal, if not, the sound and picture synchronization parameter set for the UI interface in the last detection can still be adopted, the sound delay time value is not changed at the moment, but if the frame rate is changed, the television terminal can carry out data correction on the sound delay time value, adjust the sound delay time value and further refresh the sound delay data, a user can not find that the sound and picture synchronization parameter set for the UI interface is changed, but the sound delay time value corresponding to the sound and picture synchronization parameter set for the UI interface is changed, the frame rate is matched with the frame rate of the current network film source, so that the user can not find that the sound and picture synchronization parameter of the television is modified, but the sound delay time can be adjusted later, the actual sound delay time heard by the user changes and is matched with the frame rate of the current network film source, so that frequent adjustment of sound and picture synchronization parameter values by the user can be avoided, and the user experience is improved.
Embodiments of the present invention provide a computer-readable medium having stored thereon a computer program that, when executed by a processor, performs the steps of the method of fig. 2 or the steps of the method of fig. 3.
As shown in fig. 4, an embodiment of the present invention further provides a device for automatically correcting audio and video synchronization, including:
at least one processing unit 400, and at least one memory unit 401, wherein the memory unit 401 stores program code that, when executed by the processing unit, causes the processing unit to perform the following:
comparing whether the frame rate of the current network film source is the same as the frame rate of the last detected network film source;
if so, keeping the sound delay time value corresponding to the adjusted sound and picture synchronous parameter value in the UI unchanged;
if not, adjusting the sound delay time value, so that the adjusted sound delay time value is matched with the frame rate of the current network film source under the condition of keeping the sound and picture synchronization parameter value unchanged.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the invention
With clear spirit and scope. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A sound and picture synchronization automatic correction method is applied to a television terminal, and is characterized by comprising the following steps:
comparing whether the frame rate of the current network film source is the same as the frame rate of the last detected network film source;
if so, keeping the sound delay time value corresponding to the adjusted sound and picture synchronous parameter value in the UI unchanged;
if the frame rate of the current network film source is greater than the frame rate of the last detected network film source, reducing a reference value of sound delay according to the difference value between the frame rate of the last detected network film source and the frame rate of the current network film source and the number of cache frames of the main chip, and calculating a sound delay time value after the reference value of the sound delay is reduced;
if the frame rate of the current network chip source is less than the frame rate of the last detected network chip source, increasing a reference value of sound delay according to the difference value between the frame rate of the current network chip source and the frame rate of the last detected network chip source and the number of cache frames of the main chip, and calculating a sound delay time value after the reference value of the sound delay is increased;
the reference value of the sound delay is a time value of the sound delay corresponding to the network film source frame rate detected last time when the sound picture synchronization parameter value is not adjusted;
the sound delay time value is calculated by the following steps:
and calculating the sound delay time value matched with the frame rate of the current network film source according to the sound picture synchronization parameter value in the current UI interface, the preset user adjustment step length and the sound delay reference value.
2. The method of claim 1, wherein prior to comparing whether a frame rate of a current network slice source is the same size as a previously detected network slice source frame rate, further comprising:
and reading the frame rate of the current network film source and the frame rate of the network film source detected in the previous time period once every a preset time period.
3. A sound and picture synchronous automatic correction device is applied to a television terminal, and is characterized by comprising:
the comparison unit is used for comparing whether the frame rate of the current network film source is the same as the frame rate of the network film source detected at the previous time or not;
the holding unit is used for keeping the sound delay time value corresponding to the adjusted sound and picture synchronous parameter value in the UI unchanged if the adjusted sound and picture synchronous parameter value is in the UI state;
an adjusting unit, configured to reduce a reference value of a sound delay according to a difference between a frame rate of the previous network slice source detected and a frame rate of the current network slice source and a number of buffer frames of a main chip if the frame rate of the current network slice source is greater than the frame rate of the previous network slice source detected;
if the frame rate of the current network film source is less than the frame rate of the last detected network film source, increasing a reference value of sound delay according to the difference value between the frame rate of the current network film source and the frame rate of the last detected network film source and the number of cache frames of a main chip;
the reference value of the sound delay is a time value of the sound delay corresponding to the network film source frame rate detected last time when the sound picture synchronization parameter value is not adjusted;
a calculation unit for calculating a sound delay time value after reducing a reference value of the sound delay or calculating a sound delay time value after increasing a reference value of the sound delay;
the computing unit is further specifically configured to:
and calculating the sound delay time value matched with the frame rate of the current network film source according to the sound picture synchronization parameter value in the current UI interface, the preset user adjustment step length and the sound delay reference value.
4. The apparatus of claim 3, wherein the apparatus further comprises:
and the periodic reading unit is used for reading the frame rate of the current network film source and the frame rate of the network film source detected in the previous time period once every preset time period.
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| CN113038224B (en) * | 2021-03-26 | 2023-03-24 | 北京小米移动软件有限公司 | Sound and picture synchronization method and device |
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