WO2010121475A1

WO2010121475A1 - Method for video monitoring and apparatus thereof

Info

Publication number: WO2010121475A1
Application number: PCT/CN2009/075863
Authority: WO
Inventors: 陕毅; 关君; 霍东风; 段新平
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-04-20
Filing date: 2009-12-23
Publication date: 2010-10-28
Also published as: CN101867786A

Abstract

A method for video monitoring, includes the following steps: A. setting the prerecording time interval X; B. writing dynamically the real-time media stream within the time interval X before current time in a prerecording buffer module; C. when an alarm is activated, writing the real-time media stream after the alarm is activated in a disk, and writing the media stream stored in the prerecording buffer module within the time interval X before the alarm is activated in the disk; C. when the alarm is cancelled, stopping writing the real-time media stream after the alarm is cancelled in the disk, and returning to step B.

Description

Video monitoring method and device

Technical field

The invention belongs to the field of video surveillance, and in particular relates to a video monitoring method and device.

Background technique

The existing video surveillance system generally captures real-time monitoring information through monitoring devices such as a camera and a cloud platform, and records all the collected real-time media streams in the storage module and plays them through a client device such as a computer. In order to save the storage space of the disk and protect the performance of the disk, many video surveillance systems use the video-monitoring method triggered by the alarm. That is, when the system detects the alarm information or the monitoring personnel finds an abnormal situation, the alarm system is immediately activated. At the moment of the alarm, the real-time media stream is written to the disk for the client to play, query and manage. This method can effectively utilize the disk storage space and reduce the workload of the storage module. However, the real-time media stream is not saved on the disk for a period of time before the alarm time, and this information is often critical and can be investigated for the case. , judgment and analysis provide very critical clues or references, so there are still some shortcomings in this monitoring method.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a video monitoring method and apparatus for saving media space and capable of recording media streams for a period of time before an alarm time.

The technical solution adopted by the present invention to solve the technical problems thereof is:

A video monitoring method, comprising the following steps:

A. Set the pre-recording duration X;

B. Dynamically write the real-time media stream in the X period before the current time in the pre-recorded cache module; C. When the alarm is triggered, the real-time media stream starting from the alarm time is written to the disk, and the pre-recorded cache module is stored. The media stream in the X period before the alarm time is written to the disk;

D. When the alarm is released, stop writing the real-time media stream after the alarm time to the disk, and return to the step. Step

The pre-recorded cache module is provided with a cache queue, and the step B includes: writing a real-time media stream in the X period before the current moment to the cache queue, and after the buffer queue is full, returning to the queue to rewrite Into the real-time media stream.

In the step C, the real-time media stream starting from the alarm time is written into the disk through the pre-recorded cache module.

The step D further includes: when a new alarm is triggered before the current alarm is released, waiting for all the alarms to be released before stopping the writing of the real-time media stream to the disk.

A video monitoring front end, the video monitoring front end is configured to collect and encode a real-time media stream, and send the collected and encoded real-time media stream to a pre-recording cache module and a storage module.

A video monitoring device, comprising: a pre-recorded cache module, a storage module, a control module, a client, and a video monitoring front end as described above, wherein

The pre-recorded cache module is configured to dynamically write a real-time media stream in the X period before the current time, and when the alarm is triggered, write the real-time media stream starting from the alarm time to the disk;

The storage module is provided with a disk, and the storage module is configured to save the monitoring media stream on the disk, and forward the saved monitoring media stream to the client;

The control module is configured to control the monitoring media stream to be written to the disk according to the alarm trigger or release command: when the alarm is triggered, the control writes the media stream in the X period before the alarm time to the disk, and after the alarm is released, controls the alarm time The real-time media stream stops writing to disk;

The control module further includes a pre-recording duration setting module, and the pre-recording duration setting module is configured to set a pre-recording duration;

The client is configured to receive, decode, and play a monitored media stream in the storage module.

The pre-recorded cache module is provided with a cache queue, and the pre-recorded cache module is configured to write the real-time media stream in the X period before the current time to the cache queue, and after the cache queue is full, return to the queue header. Rewrite the media stream.

The pre-recorded cache module and the storage module are disposed in the same physical unit.

The video monitoring front end includes at least one monitoring device, and the client includes at least one The client device, the storage module includes a storage server, the disk is disposed in the storage server, and the monitoring device and the client device are connected through a network.

The invention has the beneficial effects that the video monitoring method and device of the invention can record the media stream after the alarm is triggered, and can also record the real-time media stream for a period of time before the alarm time, since only the monitoring media stream within the effective time is recorded. Instead of all real-time media streams being written to disk, disk space is saved and disk performance is protected; and video information before the alarm time can often record clues or information related to the case, which has important reference for case investigation and analysis. Significance, thus facilitating the work of monitoring personnel.

BRIEF abstract

1 is a schematic diagram of a first embodiment of a video monitoring apparatus according to the present invention;

2 is a schematic diagram of a second specific implementation manner of a video monitoring apparatus according to the present invention;

3 is a flow chart of a video monitoring method of the present invention.

Preferred embodiment of the invention

The first specific embodiment:

FIG. 1 is a schematic diagram of a first embodiment of a video surveillance recording apparatus of the present invention, including: a video surveillance front end 10, a storage module 11, a pre-recorded cache module 12, a control module 13, and a client 14.

The video monitoring front end 10 includes a monitoring device and a video encoding module, and the monitoring device such as a camera, a cloud station, etc. can collect real-time video information and transmit it to a video encoding module, and the video encoding module encodes the real-time video information to form A real-time media stream, such as a transport stream (TS stream: Transpor Stream), and the like, and sends the real-time media stream to the storage module 11 and the pre-recorded cache module 12.

The storage module 11 is provided with a disk for storing the monitoring media stream. The monitoring media stream includes the media stream in the X period before the alarm is triggered and the media stream after the alarm time. The storage module 11 can monitor the device according to the instruction of the client 14. The media stream is forwarded to the client 14; the storage module 11 has a cache unit, and when the alarm is triggered, the real-time media stream starting from the alarm time is written through the cache unit. Disk.

The pre-recording cache module 12 is configured to receive the real-time media stream from the video monitoring front end 10 and dynamically write the real-time media stream in the X period before the current time; the pre-recording cache module 12 may be provided with a buffer queue in the buffer queue. Write the real-time media stream in the X period before the current time. After the buffer queue is full, return to the queue header and rewrite the media stream.

The control module 1 3 is used to control the monitoring media stream to be written to the disk according to the alarm triggering and releasing command, and the alarm triggering or releasing may come from the client 14 or from the automatic alarm system. When the alarm is triggered, the control module 13 instructs the storage module 11 to start writing the real-time media stream from the alarm triggering time to the disk, and instructs the pre-recording cache module 12 to write the media stream in the X period before the alarm time to the disk, and the alarm is released. Thereafter, the control module 13 instructs the storage module 11 to stop writing the real-time media stream to the disk.

The control module 13 further includes a pre-recording duration setting module, which can be automatically set by the system or set according to the instruction of the client 14 to set the pre-recording duration in the pre-recording buffer module 12, that is, within a certain length of time before the alarm is triggered. The media stream is written to the pre-recorded cache module 12.

The client 14 includes a client device, such as a computer, for receiving, decoding, and playing the monitoring media stream in the storage module 11, and can also send commands to the control module 13, such as a pre-recording duration setting command, an alarm triggering or releasing the command, and the like. .

Since both the storage module 11 and the pre-recorded cache module 12 can receive real-time media streams from the video control front end 10, in order to simplify the overall structure of the video monitoring device, both can be disposed in the same physical unit.

The second specific implementation method:

2 is a schematic diagram of a second embodiment of a video surveillance recording device of the present invention, similar to FIG.

In this embodiment, when the alarm is triggered, the pre-recorded cache module 12 replaces the storage module 11 to write the media stream starting from the alarm time to the disk. In this embodiment, the storage module 11 does not need to be specifically set for the alarm time. Subsequent media streams are written to the disk's cache space, thus simplifying the device. If the pre-recorded cache module 12 has a cache queue, when the alarm is triggered, the cache queue is

The media stream in the X period is written to the disk, and the real-time media stream starting from the alarm time is still written to the disk through the cache queue.

FIG. 3 is a flowchart of a video surveillance recording method according to the present invention, and the specific steps are as follows: Step S100: Set the pre-recording duration X.

Step S101: Dynamically write the real-time media stream in the X period before the current time in the pre-recorded cache module.

Step S102: The alarm is triggered, and can be started by the automatic alarm system or the client.

Step S103: Write the monitoring media stream to the disk. In the embodiment shown in Figure 1, the control module

1 3 indicates that the control module 11 writes the real-time media stream starting from the alarm time to the disk, and instructs the pre-recorded cache module 12 to write the media stream in the X period before the alarm time to the disk; in the embodiment shown in FIG. 2 The control module 13 instructs the pre-recorded cache module 12 to write the real-time media stream starting from the alarm time to the disk, and writes the media stream in the X period before the alarm time to the disk.

Step S104: It is judged whether all the alarms have been canceled, and if yes, the process goes to step S106, otherwise, the process goes to step S105 to wait for the alarm to be released.

Step S105: If all the alarms have not been released, wait for all the alarms to be released. Step S106: After all the alarms are touched, stop writing the real-time media stream after the alarm time to the disk. In the embodiment shown in FIG. 1, the control module 13 instructs the control module 11 to stop writing the real-time media stream after the alarm time to the disk. In the embodiment described in FIG. 2, the control module 13 instructs the pre-recorded cache module 12 to stop. The real-time media stream after the alarm time is written to the disk, and the process returns to step S101 to perform the loop.

The actions of steps S104 and S105 are: when a new alarm is triggered before the current alarm is released, the real-time media stream is stopped from being written to the disk after waiting for all alarms to be released. When multiple alarm monitoring tasks occur in the system, the recording is not interrupted, but the end time is postponed, and the monitoring media stream between the first alarm and the last alarm is continuously written to the disk for monitoring personnel. Get complete information.

In the video monitoring method, the pre-recording duration can be changed by the pre-recording duration setting module in the control module 13. If the pre-recording duration is 0, you do not need to write the media stream before the alarm time to the disk, and directly write the media stream starting from the alarm time to the disk.

The video monitoring front end 10 in the video monitoring device of the present invention may include multiple monitoring devices disposed at different positions, angles or distances, which can expand the monitoring range and enhance the monitoring strength; the client 14 can include multiple client devices, and the storage module There is a storage server in which the disk is located. These monitoring devices and customer devices are connected through a network, each monitoring device and customer setting The backup can be used as a network element, which is convenient for users to remotely monitor through designated monitoring devices.

In the video monitoring apparatus of the embodiment, all the real-time media streams do not need to be stored in the disk, thereby saving disk space, and protecting the disk performance by reducing the number of read and write times of the disk, thereby improving the working efficiency; The method and device not only record the real-time media stream after the alarm is triggered, but also record the real-time media stream for a period of time before the alarm is triggered. The video information during this period can often capture the key clues or information before the alarm, and investigate the case. And analysis has important reference significance, so it is convenient for monitoring work.

The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Industrial applicability

Compared with the prior art, the video monitoring method and device of the present invention can record the media stream after the alarm is triggered, and can also record the real-time media stream for a period of time before the alarm time, since only the monitoring media stream within the effective time is recorded. Instead of all real-time media streams being written to disk, disk space is saved and disk performance is protected.

Claims

Claim

1. A video surveillance method, comprising the following steps:

A. Set the pre-recording duration X;

D. When the alarm is released, stop writing the real-time media stream after the alarm time to the disk, and return to the step

The method according to claim 1, wherein: the pre-recorded cache module is provided with a cache team 歹' J;

The step B includes: writing a real-time media stream in the X period before the current moment to the cache queue, and after the buffer queue is full, returning to the queue to rewrite the real-time media stream.

The method according to claim 1 or 2, wherein in the step C, when the real-time media stream starting from the alarm time is written to the disk, the pre-recorded cache module writes.

The method according to claim 1 or 2, wherein the step D further comprises: when a new alarm is triggered before the current alarm is released, waiting for all alarms to be released before stopping to write the real-time media stream to the disk.

The method according to claim 3, wherein the step D further comprises: when a new alarm is triggered before the current alarm is released, waiting for all alarms to be released before stopping to write the real-time media stream to the disk.

6. A video surveillance front end, the video surveillance front end configured to collect and encode a real-time media stream, and send the collected and encoded real-time media stream to a pre-recorded cache module and a storage module.

A video monitoring device, comprising: a pre-recorded cache module, a storage module, a control module, a client, and a video monitoring front end according to claim 6, wherein

The pre-recorded cache module is configured to dynamically write the real-time media stream in the X period before the current time, and write the real-time media stream starting from the alarm time to the disk when the alarm is triggered;

A disk is disposed in the storage module, and the storage module is configured to save the monitoring media stream in the disk, and forward the saved monitoring media stream to the client;

The control module is configured to control the monitoring media stream to write magnetic according to an alarm trigger or release command Disk: When the alarm is triggered, the control writes the media stream in the X period before the alarm time to the disk, and when the alarm is released, the real-time media stream after the control alarm time stops writing to the disk;

The control module includes a pre-recording duration setting module, and the pre-recording duration setting module is configured to set a pre-recording duration;

The video monitoring device according to claim 7, wherein: the pre-recorded cache module is provided with a cache queue, and the pre-recorded cache module is configured to write a real-time media stream in an X period before the current time. The cache queue is written, and after the cache queue is full, it returns to the queue header and rewrites the media stream.

The video monitoring apparatus according to any one of claims 7 to 8, wherein: the pre-recorded cache module and the storage module are disposed in the same physical unit.

The video monitoring device according to any one of claims 7 to 8, wherein: the video monitoring front end includes at least one monitoring device, the client includes at least one client device, and the storage module includes storage The server is configured to be in the storage server, and the monitoring device and the client device are connected through a network.

The video monitoring device according to claim 9, wherein: the video monitoring front end comprises at least one monitoring device, the client comprises at least one client device, the storage module comprises a storage server, and the disk setting In the storage server, both the monitoring device and the client device are connected through a network.