CN111726458A - Method for controlling playback video stream to be complete and played on time by mobile phone after interference disappears - Google Patents

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

Method for controlling playback video stream to be complete and played on time by mobile phone after interference disappears

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 X_HRated playing time T_H，

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 X_HSending the video stream with the code length L in the temporary storage into a mobile phone video player to play at the limit playing speed X_HThe 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 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 the 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,

a step (2.4.2) of finding code length segments (L) not affected by interference from said 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,

Recording 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 T_nRespectively at a speed X_H、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 T_N，T_N＝{T_n}，n＝1，2....n....N，T_nReferred to as the monitoring period of time,

step (2.7.2), during the monitoring period T_nRespectively calculated at a speed X_HCode stream segment played during playing

Is constant value,

To take the speed

When in playing, the code stream segment is played,

step (2.8) judgment

Value of, aboveThe notation is: the serial number of the code stream segment,

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 met_nWhen 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 T_HWithin the playing time of the code stream, the adjusted code stream can be at the set original code stream speed X_HThe code stream of the rated content in the original code length L is completely played within the allowable error range, and the code stream can also be played at the speed X expected by the user after the interference disappears_{Expectation of},_{Expectation of}-X_H)<0.5X_HI.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 of 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.

Utilizes △ t time slot of two-stage intermediate codeless stream output to compensate interfered codestream, and uses △ t end point as X_HStart of + -5% split-rate 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 X_HRated playing time T_H，

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 X_HSending the video stream with the code length L in the temporary storage into a mobile phone video player to play at the limit playing speed X_HThe 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 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 the 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＞X_HRecording 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 T_nRespectively at a speed X_H、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 T_N，T_N＝{T_n}，n＝1，2....n....N，T_nReferred to as the monitoring period of time,

step (2.7.2), during the monitoring period T_nRespectively calculated at a speed X_HCode 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 values, superscript are: the serial number of the code stream segment,

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 met_nWhen 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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