JP2006222545A - Information recorder/reproducer, information recording/reproducing method, and digital camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recorder/reproducer in which personal information of a photoed figure and photoed date can be checked during photography while minimizing the load on a CPU when photoed data is reproduced by a common DVD player in a disc movie employing DVD media as a recording medium. <P>SOLUTION: The information recorder/reproducer having an input means for taking in a video image and voice comprises a means 103 for compressing data input from the input means, a means 109 for creating a sub-video image, and a means 111 for creating a stream including sub-video image information by using the compressed data created by the compressing means and the sub-video image created by the sub-video image creating means. The sub-video image creating means 109 creates block sub-video images concerning personal information of a plurality of photoed figures and photoed date information, creates a sub-video image by combining these block sub-video images and then multiplexes an MPEG stream and the sub-video image. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information recording / reproducing apparatus, an information recording / reproducing method, and a digital camera using a recordable DVD disc, and in particular, compresses video and audio signals input from a camera unit in a disc movie, and converts them into compressed video and audio. The present invention relates to an information recording / reproducing apparatus, an information recording / reproducing method, and a digital camera for multiplexing sub-pictures in the DVD Video standard or the DVD video recording standard.

  In recent years, DVDs that record digitally compressed video and audio are widely used, and are widely used, for example, in DVD recorders that record TV broadcasts, disc movies that use DVDs as recording media, and the like. As a result, what can only be played back in order from the beginning in the conventional VTR, the function that can be played instantaneously from the scene you want to see on the DVD, the editing function that can be easily edited It can be provided.

  MPEG (Moving Picture Experts Group) is an information compression technique for efficiently storing and transmitting these video and audio. In MPEG, a system configuration is defined as a signal configuration when a plurality of digital signals that constitute digital content such as video and audio are multiplexed into one bit stream. In addition, the DVD video recording standard and the DVD Video standard, which are application formats such as a file name, a directory structure, and a data format, are defined for recording moving images, and can be used for recording media such as DVD-RAM and DVD-R. Can be recorded. In the above-mentioned standard, special reproduction can be smoothly performed by having information data for supporting special reproduction such as fast forward and rewind. Furthermore, in addition to the main video, it is possible to insert one sub-picture as a sub-picture in the DVD video recording standard, and 32 sub-pictures in the DVD Video standard. When reproducing these sub-pictures, it is possible to select whether or not to display the sub-pictures. In the DVD Video standard, it is possible to select and reproduce one of 32 sub-pictures. It is.

In the technique disclosed in the conventional patent publication, when dubbing data recorded by a digital video camera or the like to a recordable DVD medium, the date information recorded by the digital video camera is read, and the date information is read as described above. Recording is performed on DVD media using the sub-picture function in the standard (see, for example, Patent Document 1).
Japanese Unexamined Patent Publication No. 2004-201100 (page 2-8, FIG. 1-5)

  Conventionally, digital video cameras record date and time information on a medium in addition to captured video and audio. When the recorded video, audio, and date / time information is reproduced, it is necessary to reproduce it with a digital video camera and to connect the output to a monitor such as a television for viewing. Therefore, in recent years, disc movies using DVD-RAM and DVD-R as recording media have come out, and DVD-RAM and DVD-R can be played back on a general DVD player. In the above-mentioned disc movie, the date and time of shooting was notified to the user by inserting date and time information into the title. However, there are cases where the user wants to know date and time information during playback of video and audio. In addition to date and time information, there are cases where it is desired to know personal names of persons being photographed, information that can identify individuals such as “eldest son” and “second son”, and personal information such as birthday, age, and school year. Therefore, a method of inserting date / time information or personal information into a sub-picture in the DVD Video standard or the DVD video recording standard can be considered. In Patent Document 1, when video, audio, and date / time information recorded by a digital video camera using a magnetic tape as a medium is copied to a DVD-RAM or DVD-R, the date / time information is read from the digital video camera. A sub-picture is generated based on the information and inserted into the stream. In the configuration of Patent Document 1, when date / time information is inserted into a stream as a sub-picture, the entire sub-picture image is generated, compressed, and inserted into the stream every time the date / time information is updated. Also, when personal information and date / time information are inserted into a stream as subpictures while shooting with a disc movie, it is necessary to generate a subpicture image in real time and insert it into the stream.

  However, when both personal information and date / time information are inserted into a stream as sub-pictures in this way, generating a sub-picture every time the date / time information is updated with the configuration of Patent Document 1 is a heavy load on the CPU. It was a big one.

  In addition, in the DVD Video standard, it is possible to insert 32 subpictures. When a plurality of subpictures are generated in real time during shooting with a disc movie and inserted into a stream, the date and time information is updated. In other words, generating a plurality of sub-picture images as a whole and inserting them into a stream is very heavy on the CPU.

  The present invention has been made in view of the conventional problems as described above, and provides an information recording / reproducing apparatus and information recording / reproducing method capable of greatly reducing the load on the CPU in generating a sub-picture image. The purpose is that.

  In order to solve the conventional problem, an information recording / reproducing apparatus according to claim 1 of the present invention records video, audio, and further sub-video input by an input means for capturing video and audio on a recording medium, Thus, in the information recording / reproducing apparatus for reproducing the video, audio, and sub-video, the compression means for compressing the video and audio input by the input means and generating compressed data, and the sub-video for generating sub-video A generation unit, a stream generation unit that generates a stream including sub-picture information using the compressed data generated by the compression unit, and the sub-video generated by the sub-picture generation unit; and the stream generation unit Recording means for recording the generated stream on the recording medium; and reproducing means for reproducing the video, audio, and sub-video from the stream recorded on the recording medium. And, wherein the sub-picture generating means generates the block sub-picture constituting the secondary video, and generates the sub-picture from the block sub-picture, that is obtained by said.

  2. The information recording / reproducing apparatus according to claim 1, wherein at least one of the block sub-pictures is a constant image while the stream generating means generates the stream. .

  3. The information recording / reproducing apparatus according to claim 1, wherein the sub-picture generating unit compresses each of the generated block sub-pictures in advance to generate block sub-picture compressed data. The sub-picture is generated using compressed data.

  4. The information recording / reproducing apparatus according to claim 3, wherein the block sub-picture compressed data is run-length compressed data.

5. The information recording / reproducing apparatus according to claim 1, wherein the sub-picture generating means generates one or more sub-pictures by combining a plurality of the block sub-pictures. It is a thing.

  6. The information recording / reproducing apparatus according to claim 1, wherein the sub-picture generating means generates one or more sub-pictures, and the stream including all the sub-pictures is recorded on the recording medium. It is characterized by recording.

6. The information recording / reproducing apparatus according to claim 1, further comprising sub-picture selection means for selecting at least one of the one or more sub-pictures in response to a user input, wherein the stream generation means generates a stream including a sub-picture which has been selected in the previous SL sub-picture selecting means, it is obtained by it said.

  8. The information recording / reproducing apparatus according to claim 1, wherein the stream generation unit multiplexes the video and audio compressed data and the sub-video to generate the multiplexed stream. , Is characterized by that.

  Furthermore, in the information recording / reproducing apparatus according to claim 8, the multiplexed stream is an MPEG stream.

  10. The information recording / reproducing apparatus according to claim 1, wherein one of the one or more sub-pictures is selected as a default sub-picture that is automatically displayed during reproduction. And the stream generation means generates the stream including default sub-picture information that defaults to the default sub-picture selected by the default sub-picture selection means. .

  The information recording / reproducing apparatus according to claim 10, wherein the default sub-picture selecting means selects the default sub-picture in response to a user input.

  12. The information recording / reproducing apparatus according to claim 11, wherein the default sub-picture selecting unit designates the default sub-picture as an initial value in accordance with a user input.

  13. The information recording / reproducing apparatus according to claim 11 or 12, wherein the default sub-video selection unit selects the default sub-video in response to a user input while the stream generation unit generates the stream. It is possible to change the default sub-picture information.

  14. The information recording / reproducing apparatus according to claim 1, wherein the stream generation means can insert sub-picture non-display information for hiding the sub-picture during reproduction into the stream. , Is characterized by that.

  15. The information recording / reproducing apparatus according to claim 1, further comprising recording target information input means for inputting recording target information, wherein the sub-picture generating means is input by the recording target information input means. The sub-picture is generated using the recording target information.

  16. The information recording / reproducing apparatus according to claim 15, wherein the recording target information is a name representing a recording target.

  16. The information recording / reproducing apparatus according to claim 15, wherein the recording target information is information representing a time when a recording target is generated.

  16. The information recording / reproducing apparatus according to claim 15, wherein the recording target information is a name of an individual or a family.

  16. The information recording / reproducing apparatus according to claim 15, wherein the information to be recorded is information representing the time of birth of an individual or a family.

  Furthermore, the information recording / reproducing apparatus according to any one of claims 1 to 19, further comprising time measuring means for measuring time, wherein from the recording target information and the time measuring means, when the recording target is generated or at birth It is characterized by calculating the date from

  Furthermore, in the information recording / reproducing apparatus according to any one of claims 1 to 20, the date from the time of occurrence or the time of birth is used for the sub-picture.

  Furthermore, in the information recording / reproducing apparatus according to claim 20 or 21, the date from the time of occurrence or birth is an age or a school year.

  Furthermore, in the information recording / reproducing apparatus according to any one of claims 1 to 22, at least one of the information to be recorded and a year / month from the time of occurrence is used for the fixed image. It is characterized by.

  24. The information recording / reproducing apparatus according to claim 1, wherein the recording medium is an optical disk, a magnetic disk, or a semiconductor memory that is randomly accessible.

  25. The information recording / reproducing apparatus according to claim 1, wherein the information recording / reproducing apparatus is a digital camera having a video imaging apparatus as input means.

  Furthermore, information recording / reproduction in an information recording / reproducing apparatus that records video, audio, and sub-video input by an input means for capturing video and audio on a recording medium, and reproduces the video, audio, and sub-video therefrom. A method of compressing video and audio input by the input means, generating compressed data, generating a block sub-video constituting a sub-video, generating a sub-video from the block sub-video, A stream including sub-video information is generated using the compressed data and the sub-video, the stream including the sub-video information is recorded on the recording medium, and the video and audio are recorded from the stream recorded on the recording medium. And the sub-picture is reproduced.

  According to the information recording / reproducing apparatus and the information recording / reproducing method of the present invention, the sub-picture image is generated by being divided into blocks, and the block sub-picture image is a fixed block that does not change during shooting by the user, or by the user. By treating it as a variable block that changes during shooting, it is possible to generate a sub-picture image while drastically reducing the load on the CPU. It is also possible to automatically insert person identification information, age, grade, etc. into a sub-picture during shooting with a disc movie or the like.

  Embodiments of an information recording / reproducing apparatus and an information recording / reproducing method of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a block diagram of an information recording / reproducing apparatus according to Embodiment 1 of the present invention. Here, a description will be given assuming a disk movie in which the recording medium is a DVD medium.

  In FIG. 1, an imaging unit 101 is a known CCD camera or the like, images an arbitrary place, and continuously acquires captured images of an imaging target region. The A / D conversion unit 102 performs A / D conversion of the analog video and audio signals acquired by the imaging unit 101 and converts them into digital video and audio signals. The compression unit 103 converts the digital video and audio signal generated by the A / D conversion unit 102 into an MPEG stream. The user I / F 104 is an interface for a user to operate a disc movie. The recording target information input unit 105 stores the personal name, name, date of birth, etc., which are information related to the recording target input via the user I / F 104, in the memory 106, which is a nonvolatile memory. The timing unit 107 acquires date information. The computing unit 108 calculates the age based on the date of birth stored in the memory 106 and the date / time information acquired by the time measuring unit 107. The sub-picture generation unit 109 generates an MPEG stream generated by the compression unit 103 based on the name and name stored in the memory 106, the date / time information acquired by the timekeeping unit 107, and the age calculated by the calculation unit 108. And block sub-picture image data for multiplexing. Here, as block sub-picture image data, fixed block sub-picture image data and variable block sub-picture image data are generated. The generation of fixed block sub-picture image data and variable block sub-picture image data will be described in detail later.

  The memory 110 is used when the sub-picture generation unit 109 generates block sub-picture image data, and stores the generated block sub-picture image data.

  The stream generation unit 111 uses a video and audio MPEG stream generated by the compression unit 103 and a block sub-picture image data generated by the sub-picture generation unit 109, and is a DVD that can be recorded on a DVD medium. A stream conforming to the Video standard or the DVD video recording standard is generated and recorded on the recording medium 113.

  Here, since the DVD medium is assumed as the recording medium 113, the stream generation unit 111 generates a stream (sub-picture information holding stream) compliant with the DVD Video standard or the DVD video recording standard. The stream generation unit 111 generates a stream of a format corresponding to each recording medium according to what recording medium the recording medium is.

  The stream decoding unit 112 decodes the stream recorded on the recording medium 113. The recording medium 113 is a DVD-R, a DVD-RAM, or a DVD-RW. Here, although the recording medium 113 is a DVD medium, it may be an optical medium, a magnetic disk, or a semiconductor memory. The D / A conversion unit 114 converts the data decoded by the stream decoding unit 112 into an analog signal and outputs the analog signal.

  The operation and action of the information recording / reproducing apparatus according to the first embodiment configured as described above will be described below.

  First, when the user starts shooting, a video signal and an audio signal obtained by shooting an arbitrary place, an arbitrary person, and the like by the imaging unit 101 are input to the A / D conversion unit 102. The video signal and audio signal input to the A / D conversion unit 102 are converted into digital video and audio data, and then compressed into an MPEG stream by the compression unit 103 and input to the stream generation unit 111.

  Next, in the stream generation unit 111, the block sub-picture image data divided into blocks by the sub-picture generation unit 109, run-length compressed, and stored in the memory 110 is read from the memory 110, and video and audio MPEG streams are read out. And the sub-picture image data created by combining the block sub-picture image data are multiplexed and recorded on the recording medium 113.

  Here, the block sub-picture image data includes fixed block sub-picture image data that does not change during shooting by the user and variable block sub-picture image data that changes during shooting by the user. In the fixed block sub-picture image data, the information input by the recording target information input unit 105 is divided into a plurality of blocks.

  In addition, the stream generation unit 111 generates a stream in a format compliant with the DVD Video standard or the DVD video recording standard using the video, audio, and sub-video.

  When playing back the stream recorded on the recording medium 113, the stream decoding unit 112 reads the data recorded on the recording medium 113, decodes the stream, and outputs it to the D / A conversion unit 114.

  The D / A converter 114 converts the input digital data into analog data and outputs it. Regarding the decoding of the sub-picture in the stream decoding unit 112, the sub-picture is decoded according to information on the sub-picture conforming to the DVD Video standard or the DVD recording standard, and the sub-picture image is superimposed on the video and output.

  Next, generation of fixed block subpicture image data and variable block subpicture image data in the subpicture generation unit 109 will be described with reference to FIGS. 1 and 2.

  First, in the recording target information input unit 105, the name of a person the user wants to register, names such as “father”, “mother”, “eldest son”, “second son”, the date of birth of the person, etc. are input and stored in the memory 106. Let me register. As information to be registered here, personal information other than the information listed here may be input, or information other than a person may be input.

  Next, every time the disc movie is turned on by the user, the date of birth of the person registered as described above is called up, and based on the date of birth and the date / time information acquired by the timing unit 107 The computing unit 108 calculates the age, school year, etc. of the person when the disc movie is turned on.

FIG. 2 is an example of a block sub-picture image divided for each block.
Here, as an example, it is assumed that names such as “father”, “mother”, “eldest son” and “second son” and their dates of birth are registered in the recording target information input unit 105.

  The fixed block sub-picture image 201 includes a name “Father” registered in the recording target information input unit 105, a father's date of birth input in the recording target information input unit 105, and a date and time that can be acquired in the time measuring unit 107. Based on the information, the age information calculated by the calculation unit 108 is converted into a bitmap and a fixed block sub-picture image is generated.

  Similarly, in the fixed block sub-picture images 202, 203, and 204, the respective pieces of information of “mother”, “eldest son”, and “second son” are converted into bitmaps, and fixed block sub-picture images (father 40 years old, mother 39 years old, eldest son 12) , Second son 10 years old).

  Next, the fixed-block sub-picture images that have been bitmapped are run-length compressed to generate fixed-block sub-picture image data and stored in the memory 110. Here, the fixed block sub-picture image data is generated when the disc movie is turned on by the user and is not photographed.

Next, the variable block sub-picture image 205 is generated when the user starts shooting.
The variable block sub-picture image 205 is converted into a bitmap based on the date / time information acquired by the clock unit 107, and a variable block sub-picture image (2004/08/23 15:20) is generated.

  Further, the variable block sub-picture image is run-length compressed to generate variable block sub-picture image data and stored in the memory 110.

  Here, for the variable block sub-picture image data 205 (2004/08/23 15:20), the variable block sub-picture image is updated every time the date / time information (2004/08/23 15:20 information itself) is updated. Data 205 (2004/08/23 15:20) is also updated and generated. Here, as an example, the date information (2004/08/23) is also a variable block sub-picture image, but this date information is a fixed block sub-picture image, and only the time information (15:20) It may be a variable block sub-picture image.

  In the fixed block sub-picture images 201 to 204, the age is used. However, the age may change due to the birthday during shooting. In that case, when the age changes, only the fixed block sub-picture images 201 to 204 whose age has changed are updated and generated. Also, when the date information is fixed block sub-picture image data, if the date changes during shooting, the fixed block sub-picture image data related to date information (2004/08/23) is updated and generated. That's fine.

  When the user starts shooting, the sub-picture that is combined with the fixed block sub-picture image data and the variable block sub-picture image data stored in the memory 110 and multiplexed into the video and audio MPEG streams in the stream generation unit 111 Used as image data.

  Here, as a method for converting each data into a bitmap, the generation of the fixed block sub-picture image and the generation of the variable block sub-picture image are both performed using a character code bitmap conversion table or a bitmap data buffer (not shown). By using the same method as the method disclosed in Japanese Patent Application Laid-Open No. 2004-201100, bitmapping is performed.

  Next, how to combine the fixed block sub-picture image data and the variable block sub-picture image data in the stream generation unit 111 will be described with reference to FIG. 1, FIG. 2, FIG. 3, and Table 1.

  Here, it is assumed that recording is performed on the recording medium 113 in a format compliant with the DVD Video standard.

  In the DVD Video standard, up to 32 subpictures can be inserted into a stream. As an example, sub-picture image data is generated by combining the five types of block sub-picture image data in FIG.

  With the combination of the five types of block subpicture image data, 31 types of subpicture image data can be generated, and these 31 types of subpicture image data are multiplexed with video and audio MPEG streams.

  First, in the stream generation unit 111, a template as shown in Table 1 is provided in advance, and actual sub-picture image data is generated based on the template. The template in Table 1 shows how to combine five types of block sub-picture image data.

  As shown in the combination of fixed block subpicture image data and variable block subpicture image data in Table 1, (1) is a fixed block subpicture image 201 in FIG. 2, (2) is a fixed block subpicture image 202 in FIG. (3) corresponds to the fixed block subpicture image 203 in FIG. 2, (4) corresponds to the fixed block subpicture image 204 in FIG. 2, and (5) corresponds to the variable block subpicture image 205, respectively.

  For example, sub-picture number SP13 is a combination of fixed block sub-picture image data of fixed block sub-picture image 201 and variable block sub-picture image data of variable block sub-picture image 205 in FIG. Generate data.

  In the sub picture number SP14, one sub picture image data is obtained by combining the fixed block sub picture image data of the fixed block sub picture image 202 and the variable block sub picture image data of the variable block sub picture image 205 in FIG. Generate.

  In this way, block sub-picture image data to be multiplexed into the video and audio MPEG streams is determined based on the template shown in Table 1, and each fixed block sub-picture image data, variable block sub-image is determined from the memory 110. Picture image data is read out, combined, and multiplexed with video and audio MPEG streams as sub-pictures in the DVD Video standard.

  FIG. 3 shows an example in which a fixed block sub-picture image and a variable block sub-picture image are actually displayed in combination.

  For example, the sub-picture image of sub-picture number SP13 in Table 1 is as 301 in FIG. Further, the sub-picture image SP14 is 302, SP15 is 303, SP16 is 304, and so on. Here, for the sake of clarity, the sub-picture image to be displayed has been described. Actually, however, the stream generation unit 111 performs a run stored in the memory 110 when the sub-picture is multiplexed into a video or audio MPEG stream. The length-compressed fixed block sub-picture image data and variable block sub-picture image data are read and multiplexed by combining these data.

  Also, as an example, all 31 types of sub-pictures are generated and inserted into the stream. However, from the 31 types of sub-picture images shown in Table 1, the user wants to insert an image that the user wants to insert into the stream as a sub-picture. It is also possible to insert only the selected sub-picture selected by the I / F 104 into the stream.

  For example, the thumbnail image display of the sub-picture image is performed so that the user can select the image to be inserted as the sub-picture, and the sub-picture image that the user wants to insert as the sub-picture is selected from the thumbnail image, and the selected sub-picture image In the stream generator 111, the sub-picture image data is multiplexed with the video and audio MPEG streams.

  Next, the structure of a stream in which sub-pictures are multiplexed into video and audio MPEG streams in the stream generation unit 111 will be described.

  FIG. 4 shows the structure of a video object (VOB). The video object (VOB) in FIG. 4 is composed of a set of cells (CELL), which are basic units of content to be played back.

  Furthermore, a cell is composed of a set of video object units (VOBU). A VOBU is composed of a set of a navigation pack (NV_PCK), a video pack (V_PCK), an audio pack (A_PCK), and a sub-picture pack (SP_PCK).

  Here, the navigation pack NV_PCK includes navigation data, the video pack V_PCK includes video data, the audio pack A_PCK includes audio data, and the sub-picture pack SP_PCK includes sub-picture data.

  Video data is a video elementary stream compressed by MPEG, and is usually composed of an I picture, a P picture, and a B picture.

  The audio data is an audio elementary stream compressed by the audio compression format, and the sub-picture data is data obtained by run-length compression of bitmap data.

  SP_PCK includes a pack header, a packet header, sub_stream_id, and sub-picture data. Here, stream_id included in the packet header is id data (10111101b) representing the private stream 1, and it is necessary to insert data including a decoding sub-picture stream number from 0 to 31 into sub_stream_id.

  In FIG. 4, only one type of SP_PCK is shown. However, in the DVD Video standard, 32 types of subpictures can be inserted, and when the 32 subpicture images are inserted, the subpicture stream number is set. Accordingly, it is necessary to change sub_stream_id.

  Further, in the information recording / reproducing apparatus of the first embodiment, it is possible to insert a plurality of sub-picture images into a stream. Further, when reproducing the stream, a default sub-picture image displayed automatically is displayed. It is possible to determine.

  An operation for determining a default sub-picture image will be described with reference to FIG. 1 and Table 2. Table 2 is a template obtained by adding default setting items to the template of Table 1.

  When determining a default sub-picture image, first, the user selects a sub-picture image as a default sub-picture image at the user I / F 104 before shooting. In accordance with the selected sub picture, the stream generation unit 111 stores default information in a sub picture template as shown in Table 2.

  Then, after shooting, default information is recorded on the recording medium 113 based on the template shown in Table 2. Here, the user selects a default sub-picture image before shooting, but it is also possible to change the default sub-picture during shooting.

  At this time, although not shown in Table 2, change information can also be stored. It is also possible to prevent the sub-picture image from being displayed by default when playing back the captured stream.

Next, the configuration of a program chain (PGC) for inserting default information will be described.
FIG. 5 shows the structure of the program chain (PGC).

  The PGC is composed of playback information called program chain information (PGCI) and cells in the VOB necessary for playback of the PGC. A general DVD player uses this PGC to reproduce data recorded on a DVD medium.

  PGCI is navigation data for controlling reproduction, and is composed of PreCommand, a reproduction control block including cell ID1, cell ID2, cell ID3, and so on, and PostCommand. The VOBS in FIG. 5 is a set of VOBs. The configuration of the VOB is as described above.

FIG. 6 shows the structure of PGCI.
PGCI is a program chain general information (PGC_GI), a program chain command table (PGC_CMDT), a program chain program map (PGC_PGMAP), a cell playback information table (C_PBIT), and a cell location information table (C_POSIT). Composed.

  PGC_GI is information related to PGC. PGC_CMDT is a description area for PGC PreCommand and PostCommand and cell commands. PGC_PGMAP is a map showing the structure of the program in the PGC. C_PBIT is a table that defines the playback order of the cells in the PGC, and C_POSIT describes the VOBID number and cell ID number of the cell used for the PGC.

  Further, a general DVD player has a system parameter (SPRM (0 to 23)), and performs a reproduction operation according to the system parameter.

  That is, the SPRM (2) parameter is used when reproducing the sub-picture image. Here, in order to rewrite SPRM (2) which is a parameter of the DVD player, when the information of SPRM (2) is described in the PreCommand of PGC_CMDT shown in FIG. ) Is rewritten.

  FIG. 7 shows the configuration of SPRM (2). SPRM (2) is composed of 2 bytes, and SP_disp_flag determines display / non-display of a sub picture. When 0, sub picture display is impossible, and when 1, sub picture display is possible. SPSTN is the stream number of the display sub-picture. Therefore, as shown in Table 2, when it is desired to use SP2 as the default sub-picture image, the DVD player writes 1 (binary number) in SP_disp_flag of SPRM (2) and 000010 (binary number) in SPSTN. A navigation command may be set in the PreCommand of PGC_CMDT shown in FIG.

  As the navigation command, a SetSTN instruction of a SetSystem instruction group for setting system parameters is known.

Similarly, in order not to display a sub-picture by default, a navigation command may be set in PreCommand so that 0 (binary number) is written in SP_disp_flag of SPRM (2).

  In this way, by using the navigation command, it is possible to set a default sub picture or not display a sub picture by default. Details are described in the DVD Video standard.

FIG. 8 is a flowchart of the operation after the power is turned on in the disc movie in the first embodiment.

  First, the power is turned on (step S801), and it is confirmed whether recording target information is registered (step S802).

  If the recording target information is not registered, the recording target information input by the user via the user I / F 104 is stored in the memory 106 (step S803).

Next, when the recording target information is registered in step S802 or the registration of the recording target information is completed in step S803, the date of birth registered as the recording target information stored in the memory 106, and the time counting unit 107 Based on the date and time information acquired in step 3, the fixed block sub-picture of the fixed block sub-picture image as shown in 201 to 204 in FIG. 2 is used by using the age calculated by the calculation unit 108 and the name registered as the recording target information. Picture image data is generated and stored in the memory 110 (step S804).
Thus, when the power is turned on, the fixed block sub-picture image data is generated.

  Next, FIG. 9 is a flowchart when the user selects a default sub-picture image.

  After the operation shown in FIG. 8 is performed, first, a thumbnail image of a selection sub-picture image is generated so that the user can select a default sub-picture image, and the thumbnail image is displayed on the user I / F. (Step S901).

  At this point, since variable block subpicture image data has not been generated, temporary variable block subpicture image data that can be recognized as time information is generated, and combined with fixed block subpicture image data, a thumbnail image is generated. To do.

  Next, the user selects a default sub-picture image (step S902). Here, the user can also specify that the sub-picture image is not displayed by default.

  Next, the template shown in Table 2 is updated based on the selected sub-picture image (step S903).

  FIG. 10 is a flowchart when shooting is started in the disc movie in the first embodiment.

  First, photographing is started (step S1001), and variable block sub-picture image data such as 205 in FIG. 2 is generated using the date / time information acquired by the timer 107 (step S1002).

  Next, it is determined whether or not the time has been updated based on the date and time information acquired by the time measuring unit 107 (step S1003).

If the time has been updated, variable block sub-picture image data is generated using the updated date and time information and stored in the memory 110 (step S1004).
If not updated, the variable block sub-picture is not generated.

  Next, if the update of the variable block sub-picture is completed in step S1004, or if the time is not updated in step S1003, an MPEG stream of captured video and audio is generated by the compression unit 103 (step S1005). .

  Next, sub-picture image data generated by combining the fixed block sub-picture image data and variable block sub-picture image data stored in the memory 110 based on the template of Table 2, and the generated video and audio Multiplexing with the MPEG stream is performed (step S1006), and the multiplexed stream is recorded on the recording medium 113 (step S1007).

  Next, it is determined whether or not to end shooting (step S1008). When shooting is ended by the user, PGCI that is information for reproducing recorded video, audio, and sub-pictures is recorded. Recording is performed on the medium 113 (step S1009).

Here, when the default sub-picture image is selected by the user, the default information of the template in Table 2 is reflected on the PGCI, and the PGCI is recorded on the recording medium 113. If shooting is not completed in step S1008, the process returns to step S1003 again.
Using such a flow, shooting is performed in the disc movie in the first embodiment.

  In the first embodiment, the description has been made on the assumption that recording is performed on the recording medium 113 in accordance with the DVD Video standard. However, by using a similar method, sub-picture image data in a format compliant with the DVD video recording standard is used. Can be multiplexed into a video and audio MPEG stream and recorded on the recording medium 113.

  As described above, in Embodiment 1 of the present invention, a sub-picture image is generated by being divided into blocks, where the sub-picture image is fixed block sub-picture image data that does not change during shooting by the user, Since it is generated as one of variable block sub-picture image data that changes during shooting by the user and these block sub-picture images are combined to generate a sub-picture image, date / time information is inserted into the stream as a sub-picture Even in such a case, it is not necessary to regenerate the entire sub-picture image every time the date / time information is updated, and it is sufficient to recreate only the required portion of the divided blocks, which reduces the CPU load. Sub-pictures can be generated with a drastic reduction.

  In addition, it is possible to automatically insert the identification information, age, grade, etc. of a person into a sub-picture during shooting with a disc movie, so shooting with a disc movie using DVD media as a recording medium. Even when the recorded data is reproduced by a general DVD player, the personal information of the photographed person and the date and time when the photographed person can be easily confirmed.

  The information recording method and information recording / reproducing apparatus according to the present invention can automatically insert identification information, age, and school year of a person into a sub-picture in the DVD Video standard and DVD video recording standard during shooting. This is useful in an information recording / reproducing apparatus for recording on a randomly accessible recording medium.

1 is a block diagram of an information recording / reproducing apparatus according to Embodiment 1 of the present invention. The figure which shows the example of the block subpicture image in Embodiment 1 of this invention. The figure which shows the example of the sub picture image which combined the block sub picture image in Embodiment 1 of this invention. Structure diagram of video object (VOB) in Embodiment 1 of the present invention Structure diagram of program chain (PGC) in Embodiment 1 of the present invention Structure diagram of program chain information (PGCI) in Embodiment 1 of the present invention Configuration diagram of system parameter SPRM (2) in the first embodiment of the present invention Flowchart at power-on of the information recording / reproducing apparatus according to Embodiment 1 of the present invention Flowchart when selecting a default sub-picture image in Embodiment 1 of the present invention Flowchart when shooting is started in Embodiment 1 of the present invention

Explanation of symbols

101 Imaging unit 102 A / D conversion unit 103 Compression unit 104 User I / F
105 Recording Target Information Input Unit 106 Memory 107 Timekeeping Unit 108 Calculation Unit 109 Sub Picture Generation Unit 110 Memory 111 Stream Generation Unit 112 Stream Decoding Unit 113 Recording Medium 114 D / A Conversion Unit 201 Example of Fixed Block Sub Picture Image 202 Fixed Block Sub Example of picture image 203 Example of fixed block sub-picture image 204 Example of fixed block sub-picture image 205 Example of variable block sub-picture image 301 Example of sub-picture image that combines block sub-picture images 302 Sub that combines block sub-picture images Example picture image 303 Example sub-picture image combining block sub-picture images 304 Example sub-picture image combining block sub-picture images

Claims (26)

In the information recording / reproducing apparatus for recording video, audio, and sub-video input by an input means for capturing video and audio on a recording medium, thereby reproducing the video, audio, and sub-video,
Compression means for compressing video and audio input by the input means and generating compressed data;
Sub-picture generating means for generating a sub-picture;
Stream generation means for generating a stream including sub-picture information using the compressed data generated by the compression means and the sub-picture generated by the sub-picture generation means;
Recording means for recording the stream generated by the stream generation means on the recording medium;
Playback means for playing back the video, audio, and sub-video from the stream recorded on the recording medium,
The sub-picture generating means generates a block sub-picture constituting the sub-picture, and generates the sub-picture from the block sub-picture;
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 1,
At least one of the block sub-pictures is a certain image while the stream generating means generates a stream.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 1 or 2,
The sub-picture generating means compresses the generated block sub-picture in advance, generates block sub-picture compressed data, and generates the sub-picture using the block sub-picture compressed data.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 3,
The block sub-picture compressed data is run-length compressed data.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 4,
The sub-picture generating means generates one or more sub-pictures by combining a plurality of the block sub-pictures;
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 5,
The sub-picture generating means generates one or more sub-pictures and records the stream including all sub-pictures on the recording medium;
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 5,
Sub-picture selection means for selecting at least one of the one or more sub-pictures in response to user input;
The stream generation means generates a stream including the sub-picture selected by the sub-picture selection means;
An information recording method characterized by the above. The information recording / reproducing apparatus according to any one of claims 1 to 7,
The stream generating means multiplexes the compressed video and audio data and the sub-video to generate the multiplexed stream.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 8,
The multiplexed stream is an MPEG stream.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 9,
A default sub-picture selection means for selecting one of the one or more sub-pictures as a default sub-picture automatically displayed at the time of reproduction;
The stream generation means generates the stream including default sub-picture information that defaults to the default sub-picture selected by the default sub-picture selection means.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 10.
The default sub-video selection means selects the default sub-video in response to a user input;
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 11.
The default sub-picture selection means designates the default sub-picture as an initial value according to a user input.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 11 or 12,
The default sub-video selection unit can select the default sub-video according to a user input while the stream generation unit is generating the stream, and can change the default sub-video information.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 13,
The stream generation means can insert sub-picture non-display information for hiding the sub-picture at the time of reproduction into the stream.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 1,
Having recording target information input means for inputting the pre-recording target information,
The sub-picture generating means generates the sub-picture using the recording target information input by the recording target information input means.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 15,
The recording target information is a name representing a recording target.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 15,
The recording target information is information representing the time of occurrence of the recording target.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 15,
The recording target information is an individual or family name,
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 15,
The recording target information is information representing the birth time of an individual or a family,
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 19,
Having a time measuring means for measuring time,
From the recording target information and the time measuring means, calculate the date from the time of occurrence of the recording target or birth,
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 20,
The date from the time of occurrence or birth is used for the sub-video.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to claim 20 or 21,
The date from the time of occurrence or birth is the age or school year,
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 22,
Using at least one of the recording target information and the year or month from the time of occurrence or birth for the fixed image;
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 23,
The recording medium is a randomly accessible optical disk, magnetic disk, or semiconductor memory.
An information recording / reproducing apparatus. The information recording / reproducing apparatus according to any one of claims 1 to 24,
The information recording / reproducing apparatus is a digital camera having a video imaging apparatus as input means.
An information recording / reproducing apparatus. An information recording / reproducing method in an information recording / reproducing apparatus for recording video, audio, and sub-video input by an input means for capturing video and audio on a recording medium, and reproducing the video, audio, and sub-video from the recording medium There,
Compressing the video and audio input by the input means to generate compressed data,
Generate a sub-video that constitutes a sub-video, generate a sub-video from the block sub-video,
Using the compressed data and the sub-video, generate a stream including sub-video information,
A stream containing the sub-picture information is recorded on the recording medium;
Replaying the video, audio and sub-video from the stream recorded on the recording medium;
An information recording / reproducing method.

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