KR100743247B1 - Method and apparatus for providing image ancilliary information using dummy data block and record media recorded program for realizing the same - Google Patents

Abstract

The present invention relates to a method of providing image additional information using a dummy data block, an apparatus, and a recording medium on which a program for implementing the same is recorded. According to the present invention, a method of providing image additional information to a video encoder for encoding image data is provided. (A) identifying an image data timing start code (SAV) in the header information of the image data; (B) inserting image additional information into a preset area between the image data timing start sign and the end sign (EAV) section of the image data, wherein the section corresponds to a dummy data block; And (c) providing the video encoder with header information into which the image additional information is inserted. According to the present invention, there is an advantage in that the image additional information can be provided to the video encoder through a single data path by inserting the image additional information into the dummy data block.

Encoder, Image, CCIR 656, Dummy Data, SAV, EAV, Marker

Description

Method and apparatus for providing additional image information using a dummy data block and a recording medium on which a program for implementing the same is recorded.

1 shows the structure of a video data block according to the prior art;

2 illustrates the structure of a typical auxiliary data block.

3 shows a configuration around a video encoder according to the prior art.

4 is a block diagram illustrating an image processing apparatus according to an exemplary embodiment of the present invention.

5 is a diagram illustrating a structure of an image additional information block according to an exemplary embodiment of the present invention.

6 illustrates a data path of a video encoder interface and a video encoder according to a preferred embodiment of the present invention.

7 is a flowchart illustrating a process of generating an image additional information block according to an exemplary embodiment of the present invention.

The present invention relates to a method for providing additional information of an image using a dummy data block, an apparatus, and a recording medium on which a program for implementing the same is recorded. More specifically, the present invention relates to an image effectively without additional logic blocks or pins to a video encoder. A method, apparatus, and apparatus for providing image additional information using dummy data blocks capable of providing additional information, and a recording medium in which a program for implementing the same is recorded.

In the past, image processing apparatuses such as TVs used analog video signals to receive and reproduce analog video signals from broadcast stations. However, in order to improve broadcast data transmission efficiency and improve operability and reliability of video and audio, in recent years, analog video signals have been converted to digital. Converting, transmitting, and reproducing video signals are generally used.

CCIR 601 is an international standard used to convert analog signals into digital data in image processing devices such as televisions.

CCIR 601 is an international standard for digitizing component color television images common to 525 lines (National Television System Committee (NTSC) and 625 lines (Phase Alternation by Line (PAL)) systems. SMPTE RP125 and EBU Tec . It is derived from 3246-E. CCIR 601 handles both chrominance signals (Y, RY, BY) and R · G · B video, and defines the sampling system, matrix values of R · G · B / Y, (RY), (BY), and filter characteristics. Does not define an electrical or mechanical interface.

CCIR 601 is generally considered to refer to the color chrominance components (not R · G · B) of digital images, and has a 13.5 MHz band, 4: 2: 2 sampling, 720 luminance samples per effective line, 8 or 10-bit digitization Is defined as

Meanwhile, the interface specification for digital component video signals in 525- and 625-line television systems is defined in CCIR 656, which is an international standard used to connect digital television equipment that operates with the 4: 2: 2 standard defined in CCIR 601. Standard.

According to CCIR 656, blanking, sync words, video multiplexing formats connected to parallel and serial interfaces, and the electrical characteristics of the interfaces and the mechanical details of the connectors, etc. It is defined.

1 is a diagram illustrating a structure of a video data block according to the prior art, and FIG. 1 is a diagram illustrating a format structure of video data for one line (scanning line) according to CCIR 656.

Referring to FIG. 1, a data format according to CCIR 656 includes a data transmission section and a header transmission section (header information, Header Period) for one line, and the data transmission section (Data Period) includes a section for transmitting image data. As a component, the Y component corresponding to the luminance component of the image and the Cr and Cb components corresponding to the chrominance component are included.

According to the sampling rate and sampling frequency according to the CCIR 601, a data transmission section including information on Y, Cr, and Cb components has a size of 1440 bytes for an effective sample.

Meanwhile, the header transmission section includes information for identifying the start and end of the active video timing reference code, and 276 bytes for the NTSC type (525 lines) per line. The PAL type (625 lines) has a size of 288 bytes.

In the header transmission section, there are dummy data blocks composed of hexacodes h80 and h10, which are currently used to match line cycles and frame cycles during the blanking period without any special use. It consists of 268 bytes for NTSC type (525 lines) and 280 bytes for PAL type (625 lines).

According to the CCIR 656 standard, digital video data includes not only image data including luminance and chrominance components, but also NTSC / PAL setting information, interlaced / non-interlaced scanning information, and subcarrier frequency information. Many additional information such as sync delay information, sync width information, and the like may be included.

FIG. 2 is a diagram illustrating a structure of a general auxiliary data block. Referring to FIG. 2, an ANC code, which is auxiliary data, includes a data type of A bytes, a word count of B and C bytes, or It contains information about a scan line number and a fixed pattern.

As such, various image additional information must be input to the video encoder for encoding together with the image data.

3 is a diagram illustrating a configuration around a video encoder according to the prior art. As shown in FIG. 3, a video encoder 304 conventionally receives image data from the video encoder interface 300, and the image additional information is Receiving through the SPI or I2C interface 302 was used.

However, when receiving the image additional information through a separate interface, that is, when receiving the image additional information through a data path different from the image data, an additional interface pin needs to be provided in the video encoder, and additional hardware block There was a problem that requires configuration.

In the present invention, in order to solve the problems of the prior art as described above, a method, an apparatus for providing image additional information using a dummy data block capable of encoding image data without using an additional block or an external pin, and a program for implementing the same are provided. We would like to propose a recorded recording medium.

Another object of the present invention is to provide a method, an apparatus for providing image additional information using a dummy data block capable of providing additional information about an image through a single data path, and a recording medium on which a program for implementing the same is recorded. will be.

In order to achieve the above object, according to a preferred embodiment of the present invention, a method for providing image additional information to a video encoder for encoding the image data, the image data timing start code ( Identifying a SAV (a); (B) inserting image additional information into a preset area between the image data timing start sign and the end sign (EAV) section of the image data, wherein the section corresponds to a dummy data block; And (c) providing the video encoder with header information into which the image additional information is inserted.

Here, after the identification of the image data timing start sign, the method may further include counting a predetermined number of bytes, wherein step (b) is preferably performed when the predetermined number of bytes is reached.

In addition, step (b) includes the steps of assigning a start marker to identify the start of the image additional information block; Inserting image additional information of a preset byte size; And assigning an end marker to identify an end of the image additional information block.

The image additional information includes line counter information. In the interlaced scanning method, the video encoder may determine whether a line is even or odd based on the line counter information. The image additional information may include data loss information according to a parity check of a previous line.

According to another aspect of the present invention, an image processing apparatus comprising a video encoder for encoding image data, the image processing apparatus comprising: a SAV identification unit for identifying an image data timing start code (SAV) in header information of the image data; An image additional information block generation unit for inserting image additional information into a predetermined area between the image data timing start sign and the end sign (EAV) section of the image data, wherein the section corresponds to a dummy data block; And a transmitter configured to provide the video encoder with header information into which the image additional information is inserted.

According to another aspect of the invention, a program is tangibly embodied in a program that can be executed by a digital processing device to provide image additional information to a video encoder that encodes image data and that can be read by the digital processing device. Identifying a image data timing start sign (SAV) in a medium as a medium, the header information of said image data; (B) inserting image additional information into a predetermined area between the image data timing start sign and the end sign (EAV) section of the image data, wherein the section corresponds to a dummy data block; And a recording medium on which a program for performing step (c) of providing header information into which the image additional information is inserted is provided to the video encoder.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a method, apparatus for providing image additional information using a dummy data block and a recording medium on which a program for implementing the same is recorded.

The present invention is to provide image additional information using dummy data blocks in encoding an image in an image processing apparatus such as a television, and the present invention can be implemented through a predetermined application program.

However, the present invention is not limited thereto, and a process of providing image additional information may be performed by attaching a memory chip having a program module for loading image additional information into a dummy data block inside the image processing apparatus.

In addition, the process of providing image additional information proposed by the present invention may be implemented in various forms, and it will be apparent to those skilled in the art that simple modifications of the embodiments fall within the scope of the present invention.

4 is a block diagram illustrating an image processing apparatus according to an exemplary embodiment of the present invention.

As shown in FIG. 4, the image processing apparatus according to the present invention includes a SAV identification module 400, a counting module 402, a start marker assigning module 404, an image additional information insertion module 406, and an end marker assigning module. 408 may include.

Here, the counting module 402, the start marker assignment module 404, the image additional information insertion module 406, and the end marker assignment module 408 are generated as the image additional information block generation module in that they generate a substantial image additional information block. Can be defined.

The module configuration shown in FIG. 4 is mounted in a predetermined circuit structure on the video encoder interface of FIG. 5 to perform an image additional information block generation process under the control of a microprocessor (CPU) or a digital signal processor (DSP) of the image processing apparatus. Can be.

Alternatively, however, the module of FIG. 4 may be used to refer to an application program for performing a process according to the present invention.

According to the present invention, the process of inserting the image additional information in the header transmission period while generating the header information of the video data may be performed.

As described above, the header information of the video data may include a video data timing start sign (SAV) indicating a start of an effective video (image). The SAV identification module 400 according to the present invention may include a header. A process of identifying the SAV included in the information is performed so that the image additional information can be inserted after the SAV.

On the other hand, as described above, in the data format according to CCIR 656, the dummy data block is composed of 268 bytes in the NTSC type and 280 bytes in the PAL type. can do.

Accordingly, the image additional information may be inserted in a predetermined region among all header transmission sections (between the image data timing start sign and the end sign (EAV) section of the image data), and the counting module 402 according to the present invention The number of bytes of the dummy data block is counted from the SAV to determine whether a preset point (byte number) has been reached, and when the preset point is reached, the start marker granting module 404 performs an image on the dummy data block in the video encoder. A start marker is assigned to identify that a data block containing additional information is started.

5 is a diagram illustrating a structure of an image additional information block according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the start marker assigning module 404 conventionally assigns a start marker composed of 4 bytes, such as hFF, hFF, hFF, and hFF, to a preset point among dummy data blocks filled with hexa codes h80 to h10. The process can be performed.

In the above description, the start marker is composed of 4 bytes. However, the start marker is not limited thereto, and the start marker may be provided in a different byte size.

After the start marker is applied, the image additional information insertion module 406 performs the process of inserting the image additional information into the dummy data block.

The image additional information according to the present invention includes NTSC / PAL setting information, interlaced / non-interlaced scanning information, subcarrier frequency information, sync delay information, and sync width information. It may include.

Meanwhile, the image additional information according to the present invention may further include line counter information and data loss information of the previous line.

As line counter (i.e., scan line order) information is included, in particular interlaced scanning, video encoder 602 may have an odd number of scan lines in the currently encoded image data even though scan line information is not provided through a separate interface such as an SPI or I2S interface And even.

In general, the image data includes parity information for error checking, and the image processing apparatus according to the present invention may check whether an error is performed through a parity check of a previous line, and through this, information about whether data is damaged or not is stored in a dummy data block. Can be inserted into

After inserting the various image additional information into the dummy data block, the end marker assigning module 408 may assign an end marker to identify the end of the image additional information block in the video encoder. As shown, an end marker consisting of 4 bytes of hexa code hFF, hFF, hFF, hFF can be generated.

As such, the generated image additional information block may be input to the video encoder 602 through a predetermined transmission module (not shown).

According to the present invention described above, since the video additional information for encoding the image data is included in the dummy data block of the header information, as shown in FIG. 6, the video encoder interface 600 and the video encoder 602 are single data. It is possible to send and receive data necessary for encoding only by a pass.

Meanwhile, in the above description, the image additional information is inserted into the dummy data block of the specific line. However, according to another exemplary embodiment, the image additional information may be inserted into the predetermined frame data.

In general, the image processing apparatus scans 30 frames of image per second. At this time, the first and second frames of the entire frame constituting the image are used as a blanking block. Only simple sync information is inserted and provided in the first frame.

Thus, the remaining additional information about the frame was also provided to the video encoder 602 through a separate interface.

However, the image processing apparatus according to the present invention inserts the image additional information into the dummy data blocks of each line constituting the frame as described above, while identifying the first and second frames among the frames constituting the image, and then blank these blocks. The image additional information regarding the frame may be inserted into the frame, and the video encoder receives the necessary additional information through the data path which is already set up, thereby eliminating the need for a separate interface pin.

7 is a flowchart illustrating a process of generating an image additional information block according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the image processing apparatus according to the present invention identifies a timing start code (SAV) of image (image) data indicating the start of a header transmission interval (S700), and counts bytes after SAV. It performs (S702).

It is determined whether the preset point of the dummy data block has been reached by counting the number of bytes (S704). If the preset point is reached, the image processing apparatus sends a dummy marker to the dummy data block to indicate the start of the image additional information block. In operation S706, after adding the start marker, image additional information is inserted into the dummy data block in operation S708.

When the insertion of the image additional information is completed, the image processing apparatus may assign an end marker to identify the end of the image additional information block in the video encoder (S710).

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

As described above, according to the present invention, since the dummy data block proposed in CCIR 656 is used for providing image additional information, a single data path for transmitting and receiving image data between the video encoder interface and the video encoder can be used. There is an advantage.

In addition, according to the present invention, since a single data path can be used, the video encoder does not need to have a separate interface pin for receiving the image additional information.

Claims (9)

A method of providing image side information to a video encoder for encoding image data, the method comprising: (A) identifying an image data timing start code (SAV) in the header information of the image data; And (B) inserting image additional information into a predetermined area between the image data timing start sign and the end sign (EAV) section of the image data, wherein the section corresponds to a dummy data block; And (C) providing the video encoder with header information into which the image additional information is inserted, In step (b), Assigning a start marker to identify the beginning of the image side information block; Inserting the image additional information; And And assigning an end marker to identify an end of the image additional information block. The method of claim 1, And counting a preset number of bytes after identifying the image data timing start sign. The step (b) is performed when the preset number of bytes is reached. delete The method of claim 1, The image additional information includes line counter information. In the interlaced scanning method, the video encoder determines whether a line is even or odd based on the line counter information. The method of claim 1, And the image additional information includes data loss information according to a parity check of a previous line. An image processing apparatus comprising a video encoder for encoding image data, the image processing apparatus comprising: A SAV identification unit for identifying an image data timing start code (SAV) in the header information of the image data; An image additional information block generation unit for inserting image additional information into a predetermined area between the image data timing start sign and the end sign (EAV) section of the image data, wherein the section corresponds to a dummy data block; And Including a transmitting unit for providing the video encoder with the header information in which the image additional information is inserted, And the image additional information block generating unit assigns a start marker and an end marker to recognize the beginning and the end of the inserted image additional information. The method of claim 6, The image additional information block generation unit, A start marker assigning unit for assigning the start marker to identify the start of the image additional information block; An image additional information inserting unit to insert the image additional information; And And an end marker assigning unit for assigning the end marker to identify an end of the image additional information block. The method of claim 7, wherein The image additional information block generation unit, And a counting unit counting a predetermined number of bytes after identifying the image data timing start code. A recording medium tangibly embodied and readable by a digital processing apparatus that is programmatically implemented by a digital processing apparatus to provide image additional information to a video encoder that encodes image data. (A) identifying an image data timing start code (SAV) in the header information of the image data; (B) inserting image additional information into a predetermined area between the image data timing start sign and the end sign (EAV) section of the image data, wherein the section corresponds to a dummy data block; And (C) providing header information into which the image additional information is inserted to the video encoder, In step (b), Assigning a start marker to identify the beginning of the image side information block; Inserting the image additional information; And And assigning an end marker to identify an end of said image additional information block.

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