KR100587917B1 - Recording / Playback of Still Image Recording Times on Rewritable Recording Media - Google Patents

Abstract

According to the present invention, a still image of a rewritable recording medium capable of automatically generating and recording a time at a shooting (capture) point for a still image recorded on a rewritable recording medium, and displaying a shooting time of each still image during playback. A photographing time recording / reproducing method. In the present invention, when capturing a still image, visual data at the time of photographing is automatically generated and then inserted into a recording data stream of the still image and recorded on a recording medium. Then, the shooting time data is extracted from the still image data stream read out according to the playback request of the recorded still image, and after the image stream of the read still image data is decoded, the extracted time is extracted to the decoded still image data. Data is inserted to form a playback screen. Therefore, the present invention is an excellent invention that allows the user to easily grasp the recording time of the still image during playback without the hassle of editing and recording the shooting time for the still image,

Description

Recording / Playback of Still Image Recording Times on Rewritable Recording Media

The present invention relates to a data recording method and a reproducing method of a rewritable recording medium, and more particularly, to record the time at the time of shooting (acquisition) of a still image recorded on the rewritable recording medium at the request of a user, and recording the recording time. A still image shooting time recording / reproducing method of a rewritable recording medium for reproducing a taken shooting time together with a still image.

Optical discs are becoming more common as CDs become more popular, and DVD (Digital Versatile Disc) standards are becoming more expected. Optical discs include CD-Rs and DVD-Rs that can be written once, in addition to CD-ROMs and DVD-ROMs for playback purposes, and standard discs such as rewritable CD-RWs, DVD-RAMs, or DVD-RTRWs are proposed. It is becoming. In addition, the working group's activities for the unified standard of DVD-RTRW capable of recording and reproducing are currently in progress.

Here, since rewritable DVD-RAM, DVD-RTRW, and the like are large-capacity recording media, users can use them for recording various recording data (movies, still images, moving pictures / audio, still pictures / audio, etc.). As described above, in the case where various recording data are recorded on one recording medium, as shown in FIG. 1, a recording assembly [VOB (Video OBject;); VOB # i], which is recorded in units of VOB # i; VOBI # i is generated corresponding to each recording set, and recording set reproduction order information (Cell; Cell # i) is generated corresponding to each recording set (VOB # i) to generate the original program chain [Original ProGram Chain (PGC). ); "Original reproduction sequence information collection"]. In the state where the recording data is recorded as described above, when the user requests a reproduction, the recorded recording data is recorded using the recording assembly reproduction order information (Cell # i) and the recording assembly reproduction information (VOBI # i). VOB # i) is sequentially reproduced.

Here, the recording set may be a moving picture, a still picture, a moving picture and audio recorded to be played in conjunction with the moving picture, or a still picture and an audio recorded to be played in conjunction with the still picture. These record sets are recorded on the record carrier in the form of record set data files. The recording collective reproduction information (VOBI # i) and recording collective reproduction order information (Cell # i) are recorded on the recording medium in the form of reproduction control information (navigation information) file of the recording medium.

When a still image is recorded on the recording medium, a plurality of still images (Video Part #i) and audio data recorded to be reproduced in association with the still image / audio recording collective playback information (S_VOBI # i) are included. Information about #i) is recorded, and the information includes an address on a recording medium for each still image and audio, and thus can be reproduced for each still image.

The still image is recorded in the form of one intra picture (I picture) captured by a digital camera or the like. When a large number of such still images are recorded on a recording medium, a user may need information on at what time each still image is captured and recorded. For example, if the user recorded the child's growth process through a digital camera and recorded the recording medium as a large number of still images, the child's growth process can be seen through the still image when the recording still image is reproduced. At this point, there is a problem in that there is no information as to whether the image was taken and recorded. In order to solve such a problem, a user may consider a method of creating and recording a separate screen for each shooting point of a still image, but in order to configure such a separate screen, the user must be familiar with the screen composition method. Even if you are familiar with the composition method, there is a problem such that the screen configuration takes a lot of time.

Therefore, the present invention was created to solve the above situation, and automatically generates and records the time of shooting (acquisition) for a still image recorded on a rewritable recording medium, and the recording time of each still image during playback. It is an object of the present invention to provide a method for recording / reproducing still image capturing time of a rewritable recording medium capable of displaying.

According to an aspect of the present invention, there is provided a still image recording time recording method of a rewritable recording medium, comprising: a first step of photographing a still image; And generating a visual data of the photographing time point and recording the visual data at the photographing time point in the user area of the sequence header in the photographed still image data stream.

The still image photographing time reproducing method of a rewritable recording medium according to the present invention is a still image reproducing method of a still image recording method of a rewritable recording medium. Extracting the first step; And a second step of decoding a video stream of the read still image data, and inserting the extracted visual data into the decoded still image data to form a playback screen.

According to the present invention made and configured as described above, recording time data is automatically generated when capturing a still image, and the recording time data is inserted into a predetermined section of the data stream of the captured still image, and recorded on a recording medium. do. Thereafter, at the request of the user, when the still image is reproduced, the shooting time data inserted in a predetermined section of the data stream of the still image is extracted to display the shooting time on the still image screen.

Hereinafter, preferred embodiments of a still image shooting time recording / reproducing method of a rewritable recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2A shows a recording data structure of a still image / audio recorder, wherein one still image / audio recorder is recorded in association with a still image and a video part (Video Part # i) which is an image signal of a still image. It consists of an audio part (Audio Part #i) which is the audio signal. The video part is composed of a sequence header, a group of picture (GOP) header, a plurality of video packs (V_PACK) composed of MPEG-2 system code data and video code data, and a sequence end code. do. The audio part is composed of a plurality of audio packs (A_PACK) composed of MPEG-2 system code data and audio code data. The plurality of video packs V_PACK constitutes one intra picture (I-Picture), and the plurality of audio packs A_PACK constitutes a plurality of audio frames.

The sequence header is a synchronization code indicating the start of the sequence layer as shown in FIG. 2A, followed by a sequence header code SHC having a value of "000001B3 (H)" and extended data of MPEG-2. An extended start code (ESC) having a value of "000001B5 (H)" as the start synchronous code of the extended data indicating a, and a user data start code (UDSC) having a value of "000001B2 (H)" as a sync code indicating the start of the user data. ), An 8xn bit user data area (UD) as an area that can be used by the user, and a sequence header end code (SEC) having a value of "000001B7 (H)" as a synchronization code indicating the end of the sequence. It is done by

According to the present invention, the recording time data of a still image is recorded in the user data area UD of the sequence header, and the recording time data recorded in the user data area UD is recorded when the still image is reproduced. It is read together and reconstructed on one screen. As an example of the photographing time data, as shown in Fig. 3, two-byte year data TM_YEAR representing a year as a number in the range of 1 to 9999, and a month of 1 byte representing a month in the range of 1 to 12. Data (TM_MONTH), one byte of one day data (TM_DAY) indicating a date in the range of 1 to 31, one byte of time data (TM_HOUR) indicating a time in the range of 1 to 24, and in the range of 1 to 59 1 byte of minute data TM_MIN representing minutes and 1 byte of seconds data TM_SEC representing seconds in the range of 1 to 59 are included.

On the other hand, in the still image shooting time recording / reproducing method of the rewritable recording medium according to the present invention, the shooting time may be recorded in the user area of the GOP header or the picture header. Here, the GOP header is a start of extended data indicating that the GOP header code (GSC), which is a synchronization code indicating the start of the GOP layer, and extended data of MPEG-2, are shown as shown in FIG. 2B. An extension start code (ESC) that is a sync code, a user data start code (UDSC) that is a sync code indicating the start of user data, a user data area (UD) that is an area that can be used by a user, and an end of a GOP header And a GOP header end code (SEC) which is a synchronization code. The picture header (PIC header) is the start of the extension data indicating that the picture header code (PSC), which is a synchronization code indicating the start of the picture layer, and the extension data of MPEG-2 are connected as shown in FIG. 2C. An extension start code (ESC) that is a sync code, a user data start code (UDSC) that is a sync code indicating the start of user data, a user data area (UD) that is an area that can be used by a user, and an end of a picture header And a picture header termination code (PEC) which is a synchronization code.

As described above, the present invention can record the recording time of the still image in the user area of the sequence header, the GOP header or the picture header. Hereinafter, the recording time of the still image is recorded in the sequence header only for the sake of simplicity. Only the playback method will be described.

4 is a diagram showing the configuration of a still image recording time recording / reproducing apparatus of a rewritable recording medium to which the method of the present invention can be applied. The apparatus of FIG. 4 includes an optical pickup 10 for recording a signal on an optical recording medium OD and detecting a signal therefrom; An analog signal processor 20 for transforming reproduction high frequency signals into digital data to convert the data to be recorded into analog data; A digital signal processor (30) for outputting a control signal to the optical pickup (10) according to the decomposition and synthesis of digital data, ECC block coding and decoding, and the decoding result of the data; An A / V processor 40 for decoding and outputting the input audio / video data (hereinafter referred to as 'A / V data') and encoding the input audio / video signal into A / V data; A controller 50 for controlling the component according to navigation data and a user request for reproducing a signal; A plurality of memories M1 to M3 for temporarily storing data generated in each signal processing process; And a timer 60 for transmitting the currently timed time data to the A / V processing unit 40 under the control of the controller 50.

In the apparatus of FIG. 4, the A / V processing unit 40 has the detailed configuration as shown in FIG. 5, and as an element of the A / V processing unit 40, the A / V data is inputted as an audio / video signal. An A / V encoder 41 for encoding the video signal and generating a schematic image from the input video signal; A de-Mux 42 for separately outputting a single data bit string recovered from the recording medium according to its attributes; A video decoder (43) for decoding and outputting the separated video data; A time data extracting unit (48) for extracting time data from the user data area (UD) of the sequence header among data streams output from the digital signal processor (30); A screen processor 44 for reconstructing and outputting an image screen by inserting time data information transmitted from the time data extracting unit 48 into video data transmitted from the video decoder 43; A video output unit 45 for converting and outputting video data of the video decoder 43 or video data of the screen processor 44 into an analog video signal; An audio decoder (46) for decoding and outputting the separated output compressed audio data; And an audio output unit 47 for converting and outputting the decoded audio data into an analog audio signal.

When the shooting time insertion mode is selected by the user's request, the A / V processing unit 40 configured as shown in FIG. 5 receives shooting time data from the timer 60 under the control of the control unit 50 and is currently shooting. When the still image is inputted, the A / V encoder 41 encodes the still image and, as shown in Fig. 2A, a sequence header. A video coded video stream consisting of a GOP header and an I picture is generated. The shooting time data is inserted into the user data area UD of the sequence header in a data format as shown in FIG. 3, for example, and an I picture area. After inserting the encoded still image data, it is transmitted to the digital signal processor 30 to be recorded on the recording medium.

Then, at the time of reproduction at the request of the user, the time data extractor 48 analyzes the sequence header in the digital stream output after the error checking and correction process is performed by the digital signal processor 30 and records it in the user data area UD. The captured shooting time data is extracted. In more detail, the time data extractor 48 first detects the sequence header code (SHC) having the value "000001B3 (H)" to confirm the sequence header, and then starts the extension having the value "000001B5 (H)". After detecting the code (ESC) and confirming that the extended data is inserted into the sequence header, the user data start code (UDSC) having the value "000001B2 (H)" is checked, and then the following data is extracted as the shooting time data. The controller 50 outputs a data extraction signal indicating that time data has been extracted. Here, when the shooting time is recorded in the data format of Fig. 3, 7 bytes are extracted as the shooting time data.

The MPEG demux 42 separates the video and the audio from the digital stream output from the digital signal processor 30, and the video decoder 43 and the audio decoder 46 separately input the video data and the audio. Decode the data. When the data extraction signal is input from the time data extractor 48, the controller 50 outputs a control signal to the screen processor 44 to enable it, and also outputs a control signal to the video output terminal 45. The output signal of the screen processor 44 is converted into an analog video signal and controlled to be output. Accordingly, the screen processor 44 reconstructs a still image, which is video data decoded by the video decoder 43, and a shooting time of the still image detected by the time data extractor 48, into one screen. It outputs to the video output part 45. FIG. Accordingly, the still image and its shooting time are simultaneously displayed on the screen.

Next, an embodiment of a still image shooting time recording method in a rewritable recording medium according to the present invention will be described with reference to the flow of FIG.

First, when the recording mode for the still image is selected at the request of the user, the controller 50 checks this and controls the still image recording operation (step S11). Then, when the user captures (shoots) a still image (step S13), the captured still image is input to the A / V encoder 41 of the A / V processor 40, where the control unit 50 takes the photographing. Then, control is made to read out the current time of the timer 60 and input it to the A / V encoder 41 of the A / V processor 40 (step S15). Here, audio can be captured simultaneously with the still image at the time of shooting, and in this case, the captured still image signal and audio signal are input to the A / V encoder 41.

Thereafter, the A / V encoder 41 performs intra encoding on the still image by using the MPEG-2 encoding technique to compress the still image by compression (step S17). Here, when the audio signal is input together with the still image signal, the A / V encoder 41 also encodes the audio signal by using MPEG-2 audio coding.

Subsequently, the A / V encoder 41 performs system encoding on the photographing time data input from the timer 60, for example, by inserting it into the user data area in the sequence header of the encoded video data stream. A still image coded data stream such as 2a is constructed and output to the digital signal processor 30 (step S19).

Next, the still image encoded data stream is recorded on the recording medium after the error correction encoding and 8-16 modulation processing in the digital signal processor 30 (step S21).

Next, an embodiment of a still image shooting time reproducing method in a rewritable recording medium according to the present invention will be described with reference to the flow of FIG.

First, when a playback mode for a still image is selected at the user's request, the controller 50 checks this and controls the still image playback operation (step S31). Thereafter, the data read out from the recording medium is subjected to 8-16 demodulation and error correction decoding processing by the digital signal processor 30 and output as a still picture encoded data stream. At this time, the temporal data extractor 48 detects a sequence header code SHC having a value of "000001B3 (H)" in the encoded data stream, confirms the sequence header, and starts an extension having a value of "000001B5 (H)". After detecting the code (ESC) to confirm that the extended data is inserted into the sequence header, the user data start code (UDSC) having the value "000001B2 (H)" is checked, and then a predetermined byte of data that follows (Fig. 3). 7 bytes) of the photographing time data format is extracted as the photographing time data, and a data extraction signal indicating that time data has been extracted is output to the control section 50 (step S33).

In addition, the encoded data stream output from the digital signal processor 30 is divided into a video part (V_PACK in FIG. 2A) and an audio part (A_PACK) in an MPEG demux 42, and I- of the separated video part. The picture is input to the video decoder 43, intra-decoded by the MPEG-2 decoding technique, and restored to the still image data at the time of shooting (step S35).

Thereafter, the controller 50 receives the data extraction signal from the time data extractor 48, controls the screen processor 44 to be enabled, and the video output unit 45 controls the screen processor. The output of 44 is controlled to be converted into an analog video signal. Accordingly, the screen processor 44 inserts and processes the time data from the time data extractor 48 into a predetermined section of the still image data output from the video decoder 43 through the video output unit 45. Output That is, the screen processor 44 synthesizes and outputs the decoded still image data and visual data. Therefore, the shooting time of the still image is output on the screen together with the still image.

Meanwhile, in the above-described embodiments of FIGS. 4 to 7, a case where the recording time data of the still image is recorded in the user data area of the sequence header has been exemplarily described. However, in the present invention, the recording time data of the still image is a GOP. The same method can be used for recording in the user area of the header and the picture header.

As described above, according to the still image recording time recording / reproducing method of a rewritable recording medium according to the present invention, a user data area of a sequence header, a GOP header, or a picture header of a video stream supported by MPEG-2 for each still image. The recording time data is inserted into the recording medium, and the recording time data inserted into the video stream is read out and displayed on the still image screen. It can be easily identified. In addition, the present invention is to automatically read the shooting time for the still image from the timer installed in the system and to insert into the still image video stream, so that the recording time of the recording time compared to the conventional method of editing and recording the shooting time by the user It is an excellent invention which can be shortened significantly.

1 is a view for explaining a method of generating a still image / audio recording assembly (VOB) recorded on a recording medium, reproduction information (VOBI) of the recording assembly, and reproduction order information (Cell) of the recording assembly;

2A to 2C are diagrams showing the recording data structure of a still image / audio recording body;

3 is a diagram illustrating an example of a still image shooting time data format recorded by the still image shooting time recording method according to the present invention;

4 is a diagram showing the configuration of a still image recording time recording / reproducing apparatus of a rewritable recording medium applicable to the method of the present invention;

FIG. 5 is a diagram illustrating an embodiment of a specific circuit configuration of the A / V signal processor of FIG. 4;

6 is a view showing a flow of an embodiment of a still image recording time recording method of a rewritable recording medium according to the present invention;

7 is a flowchart showing an embodiment of a method for reproducing a still image shooting time of a rewritable recording medium according to the present invention.

※ Explanation of code for main part of drawing

10: optical pickup (pick-up) 20: analog signal processing unit

30: digital signal processing unit 40: A / V processing unit

41: A / V encoder 42: MPEG Demux

43: video decoder 44: screen processor

45: video output unit 46: audio decoder

47: audio output unit 48: time data extraction unit

50: control unit 60: timer

M1 to M3: memory

OD: optical recording medium

Claims (4)

In the still image recording method of the recording medium, Step 1 of taking a still image; Generating visual data at the time of photographing and inserting the visual data at a predetermined interval in a data stream of the photographed still image; And And recording the data stream of the still image into which the visual data is inserted, on a recording medium. In the still image playback method of the recording medium, Reading a data stream of a still image requested for reproduction; Extracting still image capturing time data inserted into a predetermined section in the data stream of the still image; And And decoding the read still image data stream into a still image, and configuring a shooting time corresponding to the extracted shooting time data as a playback screen together with the still image. How to play shooting time. The method of claim 1, In the step 2, the recording time recording method of the still image, characterized in that for generating the visual data of the time of the photographing, and inserted into the user area field of the sequence header allocated in the data stream of the captured still image. The method of claim 2, In the step 2, the still image shooting time playback method characterized in that the extraction of the still image shooting time data inserted into the user area field of the sequence header allocated in the data stream of the still image.