CN111726458B - Method for controlling playback video stream to be complete and played on time by mobile phone after interference disappears - Google Patents
Method for controlling playback video stream to be complete and played on time by mobile phone after interference disappears Download PDFInfo
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- CN111726458B CN111726458B CN202010504224.1A CN202010504224A CN111726458B CN 111726458 B CN111726458 B CN 111726458B CN 202010504224 A CN202010504224 A CN 202010504224A CN 111726458 B CN111726458 B CN 111726458B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 230000008034 disappearance Effects 0.000 claims abstract description 4
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229920003169 water-soluble polymer Polymers 0.000 claims description 2
- 230000006870 function Effects 0.000 description 3
- 230000003828 downregulation Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
A method for controlling playback video stream to be complete and played on time by a mobile phone after interference disappears belongs to the field of video information control, it is characterized by that at the moment of disappearance of interference the temporary storage device is closed, in the following time slot delta t the memory can output the undisturbed video stream to the temporary storage device, and in the rest time length the temporary storage device can be opened, and the video stream to be replayed and newly-played can be played at the playback speed higher than rated speed, monitoring the difference between the output code streams in the same monitoring period during normal playing and during replay by using the monitoring period obtained by dividing the replay duration randomly and gradually and using the replay speed of 5 percent as the step length, so as to lead the rebroadcast to be close to the rated broadcasting speed quickly, realize the purpose of playing the rest code stream at the rated broadcasting speed at a constant speed, allow the error to be +5 percent of the rated code stream, solve the problem that the commercial mobile phone can not play the code stream in the rebroadcast time period, in the replay phase, the entire video content cannot be played uniformly at the nominal play rate for the remaining down period.
Description
Technical Field
A method for controlling playback of a video stream to be complete and played on time by a mobile phone after interference disappears belongs to the technical field of mobile phone output code stream control
Background
As a portable computer, the mobile phone has the functions of real-time recording and timing playback, and can store various real-time results of different contents and different expression forms which are recorded and stored in the mobile phone memory in the form of video streams, and then the real-time results are played back by a mobile phone video player through a mobile phone temporary storage device and a temporary storage device for short at specified time and time intervals so as to meet the requirements of different types of audiences. However, the disadvantage is that the complete video content cannot be completely played within the set playing time length when sudden human interference or electronic interference is encountered during the playback process, and the lack of integrity is time-consuming. In the remaining playing time after the interference disappears, the contradiction between the integrity of the playing content and the instability of the playing speed cannot be solved. For the mobile phone user, the incomplete video content can only be accepted indefinitely, because various types of mobile phones sold in the market at present lack the method for solving the problem under the condition of not changing a mobile phone hardware system, so that the mobile phone cannot completely realize all functions of the mobile phone.
Disclosure of Invention
The invention aims to provide a method for controlling a playback video stream to be complete and played on time by a mobile phone after interference disappears, which can completely realize the functions of the mobile phone.
The invention is characterized in that the method for completely playing the video stream according to the rated playing speed before the interference according to the original code length after the interference disappears is realized under the control of the CPU of the mobile phone according to the following steps:
step (1), initialization
The interference is defined as: besides the man-made interference, the method also comprises the following steps:
multipath interference, which is characterized in that the output of the dynamic temporary memory of the mobile phone, hereinafter referred to as temporary memory, is an interrupted code stream,
blind zone disturbance, characterized by the output of said register being zeroed,
thunder and lightning interference, and is characterized by that the output of the described temporary storage is discontinuous code stream,
strong electric interference, characterized in that the output of said register is a strong electric pulse signal,
the CPU sets: video code stream length L, rated playing speed XHRated playing time TH，
A mobile phone APP for adjusting the playing speed of the video frame,
and (2) under the control of the CPU, realizing a playing method with a playing code length of L according to a rated playing speed and completely after the interference disappears according to the following steps:
step (2.1), CPU fetches the video stream with code length L controlled in advance from the mobile phone memory, hereinafter referred to as memory, and inputs it into the temporary memory,
step (2.2), at rated playing speed XHSending the video stream with the code length L in the temporary storage into a mobile phone video player to play at the rated playing speed XHThe normal-state playing is carried out,
step (2.3), during the interference action, recording the interference occurrence type and the occurrence time t1Moment t of disappearance, i.e. reappearance of normal video2Length of the broadcast code when interference occursL1The output code length L of the register before the interference disappears2Calculating the interference duration (t)2-t1) Code length segment (L) to be interfered with2-L1) At time t2The output of the register is controlled to be zero,
a step (2.4) of fetching said code length segment (L) from said memory2-L1) The code length L stored in the temporary memory is embedded and linked1Then, the steps are as follows:
step (2.4.1), finding out the starting point of code length L waiting for playback from the memory, and finding out the code length L in sequence1、L2And the address of the location of their memory,
step (2.4.2) of finding code length segments (L) not affected by interference in the memory2-L1) The code length (L) not affected by interference is determined according to the address in the register2-L1) Inserting the code length L according to the storage address in the temporary storage1After that, the air conditioner is started to work,
step (2.5) of calculating the playback length (L) of the remaining time period2-L1) And a new broadcast code length (L-L)2) Within Δ t, no code stream output, these two code length segments (L-L)1) Is called as the to-be-selected play speed, hereinafter referred to as the to-be-selected play speed X'H,
X′H＞XHRecording the time period delta t required for executing the steps (2.4) to (2.5),
step (2.6), at time t3＝t2+ Δ t, at speed X'HPlaying residual code length (L-L)1)，
Step (2.7), respectively calculating the set monitoring time period TnRespectively at a speed XH、X′HCode stream segment for broadcasting
The method comprises the following steps:
step (2.7.1), dividing the rest playing time into N segments equally, wherein N is an optional positive integer and is a finite value, and obtaining a playing speed monitoring time interval sequence TN，TN＝{Tn}，n＝1，2....n....N，TnReferred to as the monitoring period of time,
step (2.7.2), during the monitoring period TnRespectively calculated at a speed XHCode stream segment played during playing
The value of the water-soluble polymer is a constant value,
to take the speed
When in playing, the code stream segment is played,
step (2.8) judgment
The value of the one or more of the one,
if:
step (2.9) is performed,
if:
step (2.10) is performed,
step (2.9), at the next monitoring time T(n+1)Down-regulated of X'HTo 0.95X'HRepeating the steps (2.7) to (2.8), and circularly iterating until a certain time T is metnWhen the temperature of the water is higher than the set temperature,
in the above-mentioned order of magnitude,
step (2.10), thereafter, at speed
The rest of the time length is played at the same speed until the code length is played.
The invention has the advantages that: under the condition that delta T is approximately equal to 0 and no code stream is output in delta T, the code stream can be output at THWithin the playing time of the code stream, the adjusted code stream can be at the set original code stream speed XHThe code stream of the rated content in the original fixed code length L is completely played within the allowable error range, and the code stream can also be played after the interference disappears (X)Expectation of-XH)＜0.05HI.e. by
To achieve the same object.
Description of the drawings:
FIG. 1 is a flowchart of the process of the present invention.
FIG. 2. undisturbed code stream (L)2-L1) The filling process of (1).
Fig. 3 shows the whole process of code length L playing.
Fig. 4. control procedure for replay.
The specific implementation mode is as follows:
the output time of the interference disappearance moment cutting-off temporary storage is used as an entry point, and the subsequent playing time length is divided into two sections, namely a compensation stage and a replay stage of the interfered code stream.
Compensating the interfered code stream in the delta t time slot of the intermediate codeless stream output of the two stages, and taking the end point of delta t as XH± 5% starting point for split replay.
In the compensation phase, the undisturbed code stream (L) in the memory is modified by the address field in the memory2-L1) The compensation is realized by filling the register with the memory address segment of the register.
During re-broadcasting, the remaining broadcasting time is divided into a plurality of monitoring time intervals at will, the output code stream difference between the rated broadcasting speed and the re-broadcasting speed is monitored in the opened monitoring time interval, and the re-broadcasting speed is quickly reduced by taking 5 percent of the re-broadcasting speed as a step length, so that the re-broadcasting speed is quickly closed to the broadcasting speed, and the purpose of uniformly broadcasting the remaining code length at the rated broadcasting speed is realized more quickly. The error is 5% of the output code stream segment when playing according to the rated playing time, so that the error is consistent with the down-regulation step length.
Claims (1)
1. The method for controlling the playback of the video stream to be complete and played on time by the mobile phone after the interference disappears is characterized in that the method for enabling the video stream to be completely played at the rated playing speed before the interference according to the original code length after the interference disappears is realized under the control of a mobile phone CPU according to the following steps:
step (1), initialization
The interference is defined as: besides the man-made interference, the method also comprises the following steps:
multipath interference, which is characterized in that the output of the dynamic temporary memory of the mobile phone, hereinafter referred to as temporary memory, is an interrupted code stream,
blind zone disturbance, characterized by the output of said register being zeroed,
thunder and lightning interference, and is characterized by that the output of the described temporary storage is discontinuous code stream,
strong electric interference, characterized in that the output of said register is a strong electric pulse signal,
the CPU sets: video code stream length L, rated playing speed XHRated playing time TH，
A mobile phone APP for adjusting the playing speed of the video frame,
and (2) under the control of the CPU, realizing a playing method with a playing code length of L according to a rated playing speed and completely after the interference disappears according to the following steps:
step (2.1), CPU fetches the video stream with code length L controlled in advance from the mobile phone memory, hereinafter referred to as memory, and inputs it into the temporary memory,
step (2.2), at rated playing speed XHSending the video stream with the code length L in the temporary storage into a mobile phone video player to play at the rated playing speed XHThe normal-state playing is carried out,
step (2.3), during the interference action, recording the interferenceBirth type, occurrence time t1Moment t of disappearance, i.e. reappearance of normal video2The length of the code played when interference occurs, L1The output code length L of the register before the interference disappears2Calculating the interference duration (t)2-t1) Code length segment (L) to be interfered with2-L1) At time t2The output of the register is controlled to be zero,
a step (2.4) of fetching said code length segment (L) from said memory2-L1) The code length L stored in the temporary memory is embedded and linked1Then, the steps are as follows:
step (2.4.1), finding out the starting point of code length L waiting for playback from the memory, and finding out the code length L in sequence1、L2And the address of the location of their memory,
step (2.4.2) of finding code length segments (L) not affected by interference in the memory2-L1) The code length (L) not affected by interference is determined according to the address in the register2-L1) Inserting the code length L according to the storage address in the temporary storage1After that, the air conditioner is started to work,
step (2.5) of calculating the playback length (L) of the remaining time period2-L1) And a new broadcast code length (L-L)2) Within Δ t, no code stream output, these two code length segments (L-L)1) Is called as the to-be-selected play speed, hereinafter referred to as the to-be-selected play speed X'H,
X′H＞XHRecording the time period delta t required for executing the steps (2.4) to (2.5),
step (2.6), at time t3＝t2+ Δ t, at speed X'HPlaying residual code length (L-L)1)，
Step (2.7), respectively calculating the set monitoring time period TnRespectively at a speed XH、X′HCode stream segment for broadcasting
The method comprises the following steps:
step (2.7.1), dividing the rest playing time into N segments equally, wherein N is an optional positive integer and is a finite value, and obtaining a playing speed monitoring time interval sequence TN，TN＝{Tn}，n＝1，2....n....N，TnReferred to as the monitoring period of time,
step (2.7.2), during the monitoring period TnRespectively calculated at a speed XHCode stream segment played during playing
The value of the water-soluble polymer is a constant value,
to take the speed
When in playing, the code stream segment is played,
step (2.8) judgment
The value of the one or more of the one,
if:
step (2.9) is performed,
if:
step (2.10) is performed,
step (2.9), at the next monitoring time T(n+1)Down-regulated of X'HTo 0.95X'HRepeating the steps (2.7) to (2.8), and circularly iterating until a certain time T is metnWhen the temperature of the water is higher than the set temperature,
in the above-mentioned order of magnitude,
step (2.10), thereafter, at speed
The rest of the time length is played at the same speed until the code length is played.
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| CN202010504224.1A CN111726458B (en) | 2020-06-05 | 2020-06-05 | Method for controlling playback video stream to be complete and played on time by mobile phone after interference disappears |
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| CN2768327Y (en) * | 2005-01-14 | 2006-03-29 | 北京蓝拓扑电子技术有限公司 | Code stream comparison device and system for digital signal transmission |
| CN106162022B (en) * | 2015-04-08 | 2019-03-19 | 深圳市尼得科技有限公司 | A kind of method, system and the mobile terminal of quick broadcasting video |
| US10620810B2 (en) * | 2015-05-15 | 2020-04-14 | Spotify Ab | Method and a system for performing scrubbing in a video stream |
| CN106851044B (en) * | 2016-12-13 | 2020-01-03 | 深圳英飞拓科技股份有限公司 | Video synchronous playback method and device |
| CN108600803B (en) * | 2018-04-10 | 2020-07-31 | 普联技术有限公司 | Playback method and device of multi-path video code stream, terminal equipment and storage medium |
| CN110876080B (en) * | 2018-08-30 | 2021-07-20 | 华为技术有限公司 | Video screen projection method and device, computer equipment and storage medium |
| CN109147831A (en) * | 2018-09-26 | 2019-01-04 | 深圳壹账通智能科技有限公司 | A kind of voice connection playback method, terminal device and computer readable storage medium |
| CN110719535B (en) * | 2019-09-02 | 2021-09-14 | 北方工业大学 | Adaptive equalization adjustment method for downlink video stream code rate at video source end |
| CN110581973B (en) * | 2019-09-30 | 2022-02-15 | 普联技术有限公司 | Data playback method and device, terminal equipment and storage medium |
| CN111163364B (en) * | 2019-12-31 | 2021-10-29 | 北方工业大学 | Method for implementing equalization control of signal code rate sent to base station by video playing website |
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