WO2005009037A1

WO2005009037A1 - Method for recording main and sub image data respectively

Info

Publication number: WO2005009037A1
Application number: PCT/CN2003/000584
Authority: WO
Inventors: Xiao-Chao Lu; Yun-Hai Teng
Original assignee: Xiao-Chao Lu; Yun-Hai Teng
Priority date: 2003-07-21
Filing date: 2003-07-21
Publication date: 2005-01-27
Also published as: CN1606873A; AU2003252520A1; CN1330177C

Abstract

The present invention disclosed a kind of method for recording main and sub image date, respectively, the object of the invention is to overcome the problem in the prior art which can not record the main and sub image data, respectively. The invention including the steps of: digitally encoding and digitally compressing the inputted original images by the image process unit; separating or replicating the original images which have been digitally encoded and digitally compressed, thereby forming the main image data flow and the sub image data flow, then recording them in the record process unit. The invention is used for the method of digitally videorecording in hard disc, tape and optical disc, which have large capability to store digital images.

Description

Method for separately recording primary and secondary image data

The present invention relates to a method for recording image data, and particularly to a method for encoding, compressing, and recording image data.

Background technique

Existing image data recording methods, such as the Japanese SONY HSR-1P digital surveillance video recording method, this method has a dual storage method of hard disk and digital tape recording, and is connected to the front and rear stages. When the hard disk image data is full, it is transferred to The digital magnetic tape recording device in the subsequent stage stores the new image data on the data tape, and because the data tape can be replaced, the method storage capacity can be infinitely expanded, which meets the requirements of large-capacity digital image recording to a certain extent; The method also aims at different image recording requirements, and sets a recording rate of 25 frames per second (PAL system) or a rate of less than 25 frames I second (PAL system); to increase the time span of the recorded image in a unit storage space.

However, the existing methods cannot record the primary and secondary image data at the same time, which is difficult to meet the different needs of internal and external administrators for using image data, especially the needs of users who delay the use of image data. In reality, the entire set of videos is often stored for long-term use in case of need. In this way, it is necessary to provide a large space for saving video tapes and to invest more manpower and financial resources for this.

Summary of the invention

The purpose of the present invention is to overcome the deficiency in the prior art that the main and auxiliary image data cannot be recorded separately at the same time, and provides a method for recording the main and auxiliary image data separately, and simultaneously records the main image data and the auxiliary image data to satisfy different uses. The image data has different needs.

The above-mentioned object of the present invention is achieved by the following technical solutions: using an image processing unit to digitally encode and compress data on an input original image; The separation or copying method forms the main image data (stream) and the sub-image data (stream) and records them in the recording processing unit. The separated image data (stream) processed or copied can be taken from analog-to-digital digitally encoded image data (stream), compressed image data (stream), or image data recorded on a record carrier. The secondary image data (stream) may be a continuous digital image frame of the original image or a discrete digital image frame of the original image portion. The main image data (stream) may be all or part of the original image data (stream) after the sub-image data (stream) is separated from the original image. The image data processing unit can edit the image data by program control according to preset conditions. Auxiliary information can be superimposed on the sub-picture data (stream).

Compared with the prior art, the present invention has the following beneficial effects: The main and auxiliary image data are recorded separately, thereby satisfying various users and different uses, which can save the space for storing recorded image data (stream) media and effectively save Human and financial resources.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart of a method for separately recording primary and secondary image data according to the present invention;

2 is a schematic diagram of an embodiment of a method for recording primary and secondary image data according to the present invention;

among them:

100 is an image processing unit, 101 is an original image, 102 is an image acquisition digital encoding unit, 103 is an image compression unit, 104 is a data connection line between the image acquisition digital encoding unit 102 and the image compression unit 103, and 105 is an image acquisition digital encoding unit 102 is a data connection line with the data editing processing unit 200, 106 is a data connection line between the image processing unit 100 and the write processing unit 300, 107 is a data connection line between the image compression unit 103 and the data editing processing unit 204;

200 is an image data processing unit, 201 is an auxiliary information external data interface, 202 is an auxiliary information processing unit, 203 is a data connection line between the auxiliary information processing unit 202 and the data editing processing unit 204, 20 is a data editing processing unit, and 205 is an auxiliary Control signal instruction, 206 is the control unit, 207 is Program control, 208 is the control connection between control unit 206 and data editing processing unit 204, 209 is the control connection between control unit 206 and recording control unit 300, 210 is the data connection between data editing processing unit 204 and recording selection control unit 304 line;

300 is an image recording processing unit, 301 is a reading unit, 302 is a record carrier, 303 is a write processing unit, 304 is a recording selection control unit, 305 is a record carrier, 306 is a recording device, 307 is a data interface, and 308 is write processing Data connection lines between the unit 303 and the reading unit 301, the record carrier 302, the recording selection control unit 304, the record carrier 305, the recording device 306, and the data interface 307, 309 is an external recording device, 310 is a record carrier, and 311 is a read unit 301 is a data connection line with the data editing processing unit 200.

Best embodiment

The invention is further described below with reference to the drawings and embodiments.

Please refer to FIG. 2, the image acquisition digital encoding unit 102 receives the image video signal from the video image signal acquisition device, that is, the original image 101, and then performs analog / digital conversion and digital encoding on the original image 101 (for example: CCIR601 is used) , CCIR605 standard), the encoded original image 101 data (stream), also called "original image encoded data (stream)". Before entering the image compression unit 103 via the connection data line 104, if data editing is required, some of the "coded image frames" in the "original image coded data (stream)" are "separated" or "copied" to form "sub-images" The encoded data (stream) enters the image data processing unit 200 via the data connection line 105. The encoded "original image encoded data (stream)" becomes "main image encoded data (stream)" and enters the image compression unit 103 via the data connection line 104. After the compression process, the "main image compressed data (stream)" “Enter the recording processing unit 300 via the data connection line 106.

"Original image coded data (stream)" before entering the image compression unit 103 via the connection data line 104, if no data editing is required, "original image coded data (stream)" directly enters the image compression unit via the data connection line 104 103 for image compression (example: JEPG or MPEG according to IS0 / IEC Series and ITU-T Η. 263 and other image compression standards, can also use WAVELET or other effective encoding and compression technology) to form "original image compression data (stream)"; if data editing is required at this time, " Part of the original image compressed data (stream) or "frame" (for example: "I frame", "JPEG frame")

"Separate" or "copy" to form "sub-image compressed data (stream)", and enter the image data processing unit 200 via the data connection line 107. The edited "original image compression data (stream)" becomes "main image compression data (stream)" and enters the recording processing unit 300 via the data line 106.

Before entering the image compression unit 300 via the connection data line 106,

(Stream) "No data editing is required, then directly enter the recording processing unit 300 via the data connection line 106." Main image compression data (stream) "or" original image compression data "sent from the data connection line 106

"(Stream)" is written to the record carrier 302 by the write processing unit 303. The record carrier 302 may be a large-capacity storage carrier such as a hard disk. When "main image compressed data (stream)" is recorded on the record carrier 302, it will be Retained until a storage cycle is overwritten by new data (stream), and when "the original image compressed data

(Stream) "After being recorded on the record carrier 302, it will be the selection point for the third data editing of this method, in this case the" frame "or" segment "of the" original image compression data (stream) " The data is read out by the reading unit 301 (that is, in a "copy" manner) to form a "sub-image compressed data stream" and sent to the image data processing unit 200 via the data connection line 311. The edited "original image compressed data ( "Stream)" can be considered as the "Main Image Compression Data Stream" of its "Sub-Image Compression Data (Stream)". A special case of the above data editing process is when "Original Image Compression Data (Stream)" will be overwritten and refreshed , Then edit it, and retain the "sub-image compression data (stream)" formed after editing.

The working process of the image processing unit 100 of this embodiment is described. In this unit 100, the "original image data (stream)"("original image encoding data stream" and "Collection of" original image compression data stream ") can be used for data editing. The "sub-picture coded data (stream)" formed after the former is edited than the "sub-picture" formed after the latter is edited "Compressed data (stream)" occupies a large space, but the effect after it is reproduced is almost no visual difference from the original input image. "Sub-image compressed data (stream)" is reproduced with the original image due to different compression methods. There are different sizes of visual differences.

During the working process of the image processing unit 100 of this embodiment, the data editing process is divided into two ways: "divide and" copy "." Separation "is to separate" original image data (stream) "(" original image encoding data stream "and Part of the "original image compression data stream" is taken out of the "frame", and "copy" is only the same "frame" that forms part of the data (stream). Therefore, it is edited in a "separated" manner The logical relationship between data (stream) is: "main image data (stream)" + "sub-image data (stream)" = "original image data (stream)"; among the data (stream) edited by "copy" The logical relationship between them is-"primary image data (stream)" = "original image data (stream)", and "sub-image data (stream)" is a backup of a portion of the "frame" of the "main image data (stream)". The former saves more data recording space, and the latter is more conducive to data security and reliability, so it needs to be comprehensively considered in practical applications.

The image data processing unit 200 of the method of this embodiment performs pre-recording processing on the "sub-image data (stream)" from the data connection line 105, 107, or 311, and includes re-editing the "sub-image data (stream)" to form A plurality of different "sub-picture data (stream)", the auxiliary information from the data connection line 203 is inserted into the "sub-picture data (stream)" or superimposed on the "image frame". The "sub-image data (stream)" processed by the data editing processing unit 204 enters the recording processing unit via the data connection line 210 and is to be recorded and processed.

The "sub-picture data (stream)" sent by the data line 210 is selected by the recording selection control unit 304 according to the instruction given by the control unit 206 through the data connection line 209 to perform the following operations: "sub-picture data (stream)" and " The main image data (stream) is recorded on the same carrier. At this time, the "sub-picture data (stream)" is sent to the write processing unit 303 via the data connection line 308, and is recorded on a specified unit of the record carrier 302; or the "sub-picture data (stream)" and "main image data (stream)""Recorded separately on different carriers. At this point, Sub-picture data (stream) is sent to the record carrier 305 for recording via the data connection line 308; or "Sub-picture data (stream)" is recorded to other recording devices (flash memory, CD-RW, DVD-RW, tape drive, etc.) Recording media (recording equipment of recording media), such as sending data to recording device 306 via data connection line 308, and recording to interchangeable recording medium 301 (optical disc, data tape, etc.); or "sub-image data (streaming ) "Via the data interface 307 (high-speed data serial port or Ethernet, etc.) and connected to an external recording system to output 309, record to various types of digital storage methods or equipment media.

Ancillary information refers to the description and supplementary information of the image content, such as the time, place, or other relevant and identifying information of the event recorded by the image content. The auxiliary information can be sent to the auxiliary information processing unit 202 in a data manner by the method external bit data interface 201 for processing. This unit processes the auxiliary information into the data editing processing unit 204 and the data mode required by the data connection line 203 is provided.

The control unit 206 may be a CPU, an MPU, or an MCU, and the control unit 206 and the program control 207 in the program storage unit perform operation control. The program stored in the program control unit 207 of the program storage unit performs program control on data editing and recording processing operations through the control unit 206 and control connections 208 and 209. The program execution is divided into two states: one is unconditional automatic execution (that is, accompanied by the entire The method runs and runs), and the second is conditional semi-automatic execution (conditions such as: this method is connected to an external port switch signal, the original image signal change threshold, and external control instructions, etc.), the condition is satisfied, and the condition is not satisfied. Or partially.

Industrial applicability

The invention can separately record the main and auxiliary image data, thereby satisfying various users and different uses, not only can save the space for storing the recorded image data (stream) media, but also can effectively save manpower and financial resources.

Claims

Rights request

1. A method for separately recording the main and auxiliary image data:

The original image is digitally encoded and data compressed by the image processing unit;

The main image data (stream) and sub-image data (stream) are separated or copied from the original image that has been digitally encoded or data compressed, and stored in the recording processing unit.

2. The method according to claim 1, characterized in that said secondary image data (stream) processed by separation or copying is taken from image data (stream) after analog-to-digital conversion digital encoding.

3. The method according to claim 1, characterized in that the secondary image data (stream) is taken from the compressed image data (stream),

4. The method according to claim 1, wherein the secondary image data (stream) is taken from image data recorded on a record carrier.

5. The method according to claim 1, wherein the secondary image data (stream) is a continuous digital image frame of the original image data (stream).

6. The method according to claim 1, wherein the secondary image data (stream) is a digital image frame in which part of the original image data (stream) is discrete.

7. The method according to claim 1, wherein the main image data (stream) is all of the original image data (stream).

8. The method according to claim 1, wherein the main image data (stream) is all or part of the image data (stream) remaining after the original image data (stream) is separated from the sub-image data (stream). .

9. The method according to claim 1, wherein the image data processing unit performs image data editing under program control according to preset conditions.

10. The method according to claim 1, wherein the editing of the image data is controlled by an auxiliary control signal input from the outside.

11. The method according to claim 1, wherein auxiliary information is superimposed on the sub-picture data (stream).

12. The method according to claim 1, wherein auxiliary information is inserted into the sub-picture data (stream).