JP2007281641A - Digital recorder/reproducer, recorder, reproducer, digital recording/reproducing method, recording method, and reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital recorder/reproducer capable of displaying a recording date in synchronism with a video image when DV stream data is reproduced. <P>SOLUTION: The digital recorder/reproducer comprises a DV codec section for acquiring recording date information from an input DV stream, an information processing section for detecting the discontinuous point of the DV stream, an MPEG codec section for converting the DV stream, a recording section for recording the output data on a recording medium and recording the recording date information acquired from a pack header every time when the discontinuous point is detected on the recording medium as chapter data 86, a microcomputer for calculating the actual recording date 104 from the recording date information t0 of the discontinuous point and a time code Δt when the data is reproduced, an OSD section generating the display data of recording date thus calculated, and a display processing section for outputing the recording date display signal and the reproduced data while compounding. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a digital recording capable of capturing a DV stream output from a digital video (DV) video device (hereinafter referred to as “DV device”), recording it on a recording medium, and reproducing the recorded data. The present invention relates to a reproducing apparatus, a recording apparatus, a reproducing apparatus, a digital recording / reproducing method, a recording method, and a reproducing method.

  In recent years, DV equipment that records video and audio data on a DV tape, for example, a DV cam (digital video camcorder) in which a video camera and a VTR are integrated, has become widespread. Data recorded on a DV tape is captured (that is, captured or dubbed) by a digital recording / reproducing apparatus, and is a digital recordable recording medium, such as a DVD (Digital Versatile Disc) or HDD (Hard Disk Drive). Saved in.

  In general, a video signal recorded on a DV tape is not an MPEG-encoded video signal but a DV signal that is data-compressed by the DV method. Here, the DV system is a standard defined by the “HD Digital VCR Council”.

  On the other hand, the digital recording / reproducing apparatus is connected via an IEEE 1394 serial bus (Institut of Electrical and Electronics Engineers 1394 High Performance Serial Bus) which is a communication control bus capable of bidirectional communication in which control signals and information signals are mixedly transmitted. When recording digital data from a DV device, it is standard to handle compressed video data in the DV format.

  The DV format has PACK HEADER (pack header) which is auxiliary data existing as one of the standards. When recording a video, the DV cam saves the recording date and time in a data area of the recording date and time in the pack header. The digital recording / reproducing apparatus can acquire video data and PACK HEADER when decoding a DV stream.

  The video recording apparatus described in Patent Document 1 displays a DV video, an operation screen, and a running state of a DV cam on a dubbing screen during DV dubbing. A video obtained by decoding the DV stream is displayed in a dedicated display area, and an operation button for instructing an operation, a running state of the DV cam, a time counter of the DV cam, and the like are displayed around the DV cam. This time counter indicates the TIME CODE (time code) of the DV tape itself of the DV cam, and changes in synchronization with the TIME CODE of the DV cam.

JP 2005-318186 A

  However, in the video recording apparatus described in Patent Document 1, the displayed time counter is the TIME CODE of the DV tape itself, and the actual shooting date and time (that is, the recording date and time when shooting data is recorded on the DV tape) is displayed as a video. There was a problem that could not be displayed in sync with. This is because a conventional video recording apparatus does not have a method for continuously storing a DV stream received from a DV device in synchronism with video during DV dubbing and cannot display a synchronized recording date and time. is there.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to display a recording date and time when displaying a video based on a DV stream captured from a DV device on a display device. And a digital recording / reproducing apparatus that can be displayed in synchronization with each other, and a recording apparatus, a reproducing apparatus, a digital recording / reproducing method, a recording method, and a reproducing method.

  The digital recording / reproducing apparatus of the present invention includes an information acquisition means for acquiring recording date / time information indicating a time when the digital video stream was recorded, included in a pack header of each pack constituting the input digital video stream, Based on the recording date and time information, discontinuous point detecting means for detecting discontinuous points in which the recording date and time are not continuous in the digital video stream, and converting means for converting the digital video stream into data in a format suitable for a recording medium; Recording means for recording the data output from the conversion means on a recording medium, and recording the recording date and time information acquired from the pack header as chapter data each time the discontinuity is detected; When reproducing the data recorded on the recording medium, the recording date and time information of the discontinuous point and the recorded Recording date and time calculating means for calculating the actual recording date and time, display information generating means for generating a recording date and time display signal for displaying the calculated recording date and time, the recording date and time display signal, And display processing means for synthesizing and outputting the reproduced data.

Further, the recording apparatus of the present invention includes an information acquisition unit that is included in a pack header of each pack constituting the input digital video stream, and acquires recording date and time information indicating a time when the digital video stream was recorded, Based on the recording date and time information, discontinuous point detecting means for detecting discontinuous points in which the recording date and time are not continuous in the digital video stream;
Conversion means for converting the digital video stream into data in a format suitable for a recording medium, and data output from the conversion means are recorded on the recording medium and acquired from the pack header each time the discontinuity is detected. And recording means for recording the recorded date and time information as chapter data on a recording medium.

  Furthermore, the playback device of the present invention is obtained from the data converted from the digital video stream and the pack header of each pack constituting the digital video stream each time a discontinuity point in which the recording date and time is not continuous in the digital video stream is detected. Recording that calculates the actual recording date and time from the recording date and time information of the discontinuous points and the time code of the recorded data when reproducing the data from the recording medium that records the chapter data that is the recorded recording date and time information Date and time calculating means; display information generating means for generating a recording date and time display signal for displaying the calculated recording date and time; and display processing means for combining and outputting the recording date and time display signal and the reproduced data. It is characterized by having.

  According to the present invention, every time a discontinuity in the input digital video stream is detected, the recording date and time information acquired from the pack header is recorded as chapter data on the recording medium. At the time of reproduction, the actual recording date and time can be calculated from the recording date and time information of the discontinuous points and the time code of the recorded data, and the recording date and time can be displayed at the time of reproduction.

Embodiment 1 FIG.
FIG. 1 is a block diagram schematically showing a configuration of a DV stream capture system including a digital recording / reproducing apparatus 12 according to Embodiment 1 of the present invention. As shown in FIG. 1, the DV stream capture system is configured to connect digital video equipment (1394 compatible equipment) 12 and 13 having a communication function using a serial bus (1394 serial bus) conforming to the IEEE 1394 standard to a 1394 serial bus (1394 cable). ) 14 for connection. Here, the 1394 compatible device 12 is, for example, a randomly accessible digital recording / reproducing apparatus, and the 1394 compatible device 13 is, for example, a DV cam (digital video camcorder). Further, by connecting a monitor television (monitor TV) 11 to the digital recording / reproducing apparatus 12 via a cable 15, display of a DV tape operation key of the DV cam 13 via the 1394 serial bus 14, and The display of the operation state of the digital recording / reproducing apparatus 12 by the key can be displayed on the display screen 31 of the monitor TV 11. Note that, when the monitor TV 11 is connected to the digital recording / reproducing apparatus 12, the monitor TV 11 may be a device that does not comply with the IEEE 1394 standard. The 1394 serial bus 14 connects the 1394 compatible devices 13 in a star shape or a tree shape. A maximum of 63 1394 compatible devices can be connected to one bus.

  FIG. 2 is a block diagram schematically showing the configuration of the digital recording / reproducing apparatus 12 of FIG. FIG. 2 shows an example in which the digital recording / reproducing apparatus 12 and the DV cam 13 are connected via a 1394 serial bus 14 which is a communication control bus capable of transmitting control signals and information signals mixedly. Yes.

  As shown in FIG. 2, the digital recording / reproducing apparatus 12 includes an interface (1394 I / F) 20 compliant with the IEEE 1394 standard, and a DV codec (DV Codec) unit 21 that receives a DV stream via the 1394 I / F 20 and performs decoding. A microcomputer 24 for controlling the entire digital recording / reproducing apparatus 12, an information processing unit 25 for analyzing and notifying various information of the digital recording / reproducing apparatus 12, and a digital conversion process for storing a DV stream MPEG codec unit 26 for performing recording, recording unit 27 for recording a DV stream on a recording medium 27a, display processing unit 23 having an encoder function for displaying an image, and OSD (on-screen) having a function of displaying graphics -Display) section 22 There. The recording unit 27 includes a recording medium built-in type in which a hard disk is used as a recording medium 27a, and a case in which the recording medium 27a is detachable such as a DVD. Means for recording an information signal recorded on a DV tape in the DV video equipment 13 on a random accessible recording medium 27 a of the digital recording / reproducing apparatus 12 includes an MPEG codec section 26 and a recording section 27. The recording system setting information and information signal recording start / recording stop information are recorded on a randomly accessible recording medium 27 a based on a control signal from the microcomputer 24. FIG. 12 shows a digital recording / reproducing apparatus that performs both recording and reproducing operations. However, the recording apparatus that performs the recording operation and the reproducing apparatus that performs the reproducing operation are different circuits or apparatuses. You can also.

  The DV codec unit 21 functions as an information acquisition unit that acquires recording date and time information indicating the time when the DV stream was recorded, included in each pack constituting the input DV stream. The microcomputer 24 functions as a discontinuous point detecting unit that detects discontinuous points where the recording date and time are not continuous in the DV video stream based on the recording date and time information. The MPEG codec unit 26 functions as conversion means for converting the DV stream into data in a format suitable for the recording medium. The recording unit 27 records the data output from the MPEG codec unit 26 on the recording medium 27a, and records the recording date / time information acquired from the pack header as chapter data on the recording medium 27a every time a discontinuity is detected. It functions as a recording means. The microcomputer 24 functions as a recording date and time calculating means for calculating the actual recording date and time from the recording date and time information of the discontinuous points and the TIME CODE of the recorded data when reproducing the data recorded on the recording medium 27a. The OSD unit 22 functions as a display information generation unit that generates a recording date / time display signal for displaying the calculated recording date / time. The display processing unit 23 functions as a display processing unit that synthesizes and outputs the recording date and time display signal and the reproduced data.

  Hereinafter, an operation in which the digital recording / reproducing apparatus 12 captures a DV stream from one selected DV device (target DV device) 13 will be described.

  First, DV video data (DV stream) is input from the target DV device to the digital recording / reproducing apparatus 12 through the 1394 serial bus 14. The input DV video data is input to the DV codec unit 21 via the 1394 I / F 20. The DV codec unit 21 converts the input DV stream into the REC656 format and sends it to the MPEG codec unit 26. The MPEG codec unit 26 converts the DV stream into a format compatible with the recording unit 27, and sends the converted data to the recording unit 27. The recording unit 27 records data on the recording medium 27a.

  The data read out by the recording unit 27 is decoded into a desired format in the MPEG codec unit 26, converted into a video signal by the display processing unit 23 that operates in accordance with a control signal from the microcomputer 24, and the interface (I / F) 28 is output to the monitor TV (reference numeral 11 in FIG. 1) and displayed on the screen of the monitor TV. Although not shown in FIG. 2, the audio signal output from the MPEG codec unit 26 is output from an audio output circuit (not shown), and is sent from an interface (I / F) 28 to a speaker (not shown). Is output.

  FIG. 3 is a recording date display screen 31 displayed on the monitor TV 11 of FIG. 3 outputs to the monitor TV 11 a video signal obtained by overlaying the OSD screen generated by the OSD unit 22 on the video signal generated by the display processing unit 23 of FIG.

  The recording date and time information displayed on the recording date and time display screen is in the form of REC DATE (recording date) and REC TIME (recording time / minute / second) in the PACK HEADER (pack header) in the DV stream from the DV cam 13. (REC DATE and REC TIME are also collectively referred to as “recording date information”), and can be obtained when the DV codec unit 21 in FIG. 2 decodes. FIG. 4 is a PACK HEADER TABLE (pack header table) showing a list of PACK HEADER information that can be acquired when the DV codec unit 21 decodes.

  In FIG. 4, horizontal frames indicated by UPPER (upper digit) correspond to hexadecimal numbers “0” to “F” (represented in binary numbers in FIG. 4) in order from the left. In FIG. 4, vertically arranged frames indicated by LOWER (lower digits) correspond to hexadecimal numbers “0” to “F” (represented in binary numbers in FIG. 4) in order from the top. . In FIG. 4, REC DATE 41 is a position where information of a recording date at the time of video recording written in the DV stream is written, and an identification address in PACK HEADER is “0x62” in hexadecimal notation. In FIG. 4, REC TIME 42 is a position where information on the recording time at the time of video recording written in the DV stream is written, and the identification address of PACK HEADER is “0x63” in hexadecimal notation. The notation “0xαβ” means that α and β are in hexadecimal notation.

  FIG. 5 is a diagram showing a detailed data array of the REC DATE 41. As shown in FIG. The REC DATE 41 is stored in a BCD (binary decimal number) format. As shown in FIG. 5, 1 byte positioned next to 1 byte of data (that is, 1 byte of data 51 in the second column) following the identification address “0x62” (that is, the first 1 byte of data 50) The recording date is stored in the data (that is, 1-byte data 52 in the third column). The recording month is stored in the subsequent 1-byte data (ie, 1-byte data 53 in the fourth column), and the recording year (ie, the 1-byte data 54 in the fifth column) is stored in the recording year ( The last two digits are stored. For example, when the REC DATE 41 is “May 21, 2001”, the data 50 to 54 in FIG. 5 are “0x62”, “0x ??”, “0x21”, “0x05”, “0x01”, respectively. It becomes. Note that “0x ??” is an indefinite value. Similarly, when the REC DATE 41 is in the 1900s, the recording year is the last two digits of the year. Since the DV standard was formulated in 1994, the data 54 indicating the recording year is “0x94” to “0x99”.

  FIG. 6 is a diagram showing a detailed data array of REC TIME 42. The REC TIME 42 is stored in the BCD format. As shown in FIG. 6, a recording frame (the frame is a 1-byte data 61 in the second column) is added to 1-byte data (that is, 1-byte data 61 in the second column) following the identification address “0x63” (that is, the first 1-byte data 60). The value of the second of recording is stored, and the value of the recording second is stored in the subsequent 1-byte data (that is, 1-byte data 62 in the third column). The subsequent 1-byte data (that is, 1-byte data 63 in the fourth column) stores the value corresponding to the recording, and the subsequent 1-byte data (that is, 1-byte data 64 in the fifth column). Stores the value of the hour of the recording date and time. For example, when the REC TIME 42 is “14:21:05, 13 frames”, the data 60 to 64 in FIG. 6 are, for example, “0x63”, “0xFF”, “0x05”, “0x21”, “ 0x14 ". At present, since no DV cam that correctly stores the value of the frame position is manufactured, a value of “0xFF” is set in the data 61, and data indicating the number of frames is ignored. However, when a DV cam that correctly stores the frame position value is manufactured, the actual frame value is input as the frame position value instead of “0xFF”.

  FIG. 7 is a diagram showing a process of extracting year, month, day, hour, minute, and second from REC DATE 41 and REC TIME 42 of VAUX (Video Auxiliary Information) in PACK HEADER. Here, all the data is extracted in the BCD format and stored as a 1-byte value in the BCD format. “Year” is “TENS of YEAR” in the 10th place extracted from the value of REC DATE41, “UNIT of YEAR” in the 1st place, “TENS of YEAR” in the upper 4 bits of 1-byte data 54, “UNITS of YEAR” is stored in the lower 4 bits, and is used as a year value (step S71). For “month”, “UNITS of MONTH” extracted from the value of REC DATE 41 is stored (step S71). For “day”, “TENS of DAY” and “UNITS of DAY” extracted from the value of REC DATE 41 are stored (step S71). For “hour”, “TENS of HOURS” and “UNITS of HOURS” of REC TIME 42 are stored, and for “minute”, “TENS of MINUTES” and “UNITS of MINUTES” of REC TIME 42 are stored, and “second”. "TENS of SECONDS" and "UNITS of SECONDS" of REC TIME 42 are stored (step S72).

  FIG. 8 is a diagram illustrating transmission timing of recording date and time information during DV dubbing and types of data to be stored. The data 81 recorded on the DV tape includes a plurality of continuous recorded video / audio data 81a, 81b, 81c. At the break (boundary) of the continuous data, there are locations 82, 83, and 84 where the recording date and time are discontinuous. The video and audio data 81 transferred to the data recording / reproducing apparatus 12 is format-converted and recorded as video / audio data 87 in the recording unit 27 (FIG. 2). On the other hand, the recording date and time is transferred to the control software in the form of a chapter notification 85 at discontinuous portions, and is stored in the recording medium 27a of the recording unit 27 as part of chapter information in the form of chapter data 86.

  FIG. 9 is a structural example of the chapter data 86 of FIG. The total number of chapters (number of previous CHAPTER) 91 attached to one title is a counter that is incremented when a discontinuous portion is detected. There are as many data groups as there are counters. This data group includes a CHAPTER NUMBER (chapter number) 92 that is a serial number from the beginning of the title, TIME CODE 93 that is the time information of the title of the discontinuous point, REC DATE 94 indicating the recording date, and recording time. REC TIME 95 indicating With this information, the time code at the beginning of the discontinuous part and the recording date and time (for example, recording date and time, hour, minute, second) of the top of the discontinuous part can be known.

FIG. 10 is a diagram for explaining a method of calculating the recording date and time when playing back a recorded DV stream. From the TIME CODE 93 included in the chapter data 86 stored in the recording unit 27, the time codes of the start points 101, 102, and 103 of the continuously recorded video / audio 87A, 87B, and 87C and the recording date and time at that time can be known. The recording date and time 104 at an arbitrary point is a recording in which a time ΔT corresponding to the difference from the time code value at the beginning 101 of the continuously recorded video and audio to the current time code value is recorded at the beginning of the continuously recorded video and audio. It can be obtained by adding to the date and time T0. This can be expressed by the following formula.
(Current recording date and time)
= T0 + Δt
= (Recording date and time at the beginning of the chapter) +
(Time equivalent to the difference of the current time code value minus the chapter start time code value)

  FIG. 11 is a flowchart showing an operation for displaying the recording date and time of the DV stream in the digital recording / reproducing apparatus 12 according to the first embodiment. The VAUX is determined from the PACK HEADER extracted from the DV stream decoded by the DV codec unit 21 (step S111), and the REC DATE 41 and the REC TIME 42 are determined from the VAUX and extracted in the BCD format (step S112). A discontinuous part is detected from the extracted recording date and time (step S113), and as soon as the discontinuous part is detected, the recording date and time information immediately after is added and notified (step S114). The notified recording unit 27 stores the recording date and time information as chapter data in the recording medium (step S115). When performing screen display, the recording date and time to be displayed is calculated (step S116), and the corresponding recording date and time is displayed on the screen (step S117).

  FIG. 12 is an explanation of step S112 for determining REC DATE 41 and REC TIME 42 included in VAUX from PACK HEADER. When the DV codec unit 21 decodes the DV stream, as shown in FIG. 4, various information of PACK HEADER is output. For this reason, in order to acquire desired data, it is necessary to determine the identification address attached to the first byte of the PACK HEADER. First, the first 1 byte is read from the decoded area (step S121). Next, it is determined whether or not the first byte is “0x62” (step S122). If it is “0x62”, since it is VAUX REC DATE 41, 4 bytes of the following data are read (step S123), and then the process returns to step S121 for reading the next PACK HEADER.

  If it is not “0x62” in step S122, it is determined whether it is “0x63” (step S124). If it is “0x63”, it is the VAUX REC TIME 42, so the next 4 bytes of data are read (step S125), and then the process returns to the process of reading the next PACK HEADER (step S121). If it is other than “0x63” in step S122, the process returns to the process of reading the next PACK HEADER (step S121).

  FIG. 13 is a flowchart showing an operation in which the digital recording / reproducing apparatus 12 according to the first embodiment detects discontinuous points in the recording date and time during DV decoding. The recording date and time is composed of year, month, day, hour, minute, and second. First, the recording date / time is changed to year, month, day, hour, minute, and second in seconds. As an example, the starting point of the year is “January 1, 1995 00:00:00”. First, REC DATE 41 and REC TIME 42 are read (step S131) and converted into the number of seconds from the starting point (step S132). Then, a comparison is made with the number of seconds stored last time, and it is determined whether the difference is +2 seconds or more or minus (step S133). When this condition is satisfied, it is determined that the recording date / time is discontinuous, and the recording date / time is notified as a chapter (step S134). Thereafter, the number of seconds is stored as the number of seconds to be stored last time (step S135), and the process returns to the process of reading REC DATE 41 and REC TIME 42 (step S131). If the condition is not satisfied in step S133, the number of seconds is stored as the number of seconds to be stored last time (step S135).

  Note that the recording date and time calculated in step S117 for calculating the recording date and time for displaying the recording date and time is displayed on the OSD unit 22 in FIG. 2 and overlaid on the video and audio screen.

  According to the digital recording / reproducing apparatus 12 according to the first embodiment, the recording date / time information acquired from the PACK HEADER is recorded as the chapter data on the recording medium 27a every time a discontinuous point of the input DV stream is detected. When reproducing the data recorded on the recording medium 27a, the actual recording date / time can be calculated from the recording date / time information of the discontinuous points and the time code of the recorded data, and the recording date / time is displayed at the time of reproduction. Can do.

  Even if the user wishes to leave the recording date and time together with the video data, it is not necessary to record the recording date and time as part of the analog video, and dubbing can be performed without changing the digital video. High quality images can be left.

Embodiment 2. FIG.
FIG. 14 is a flowchart showing the operation of the digital recording / reproducing apparatus according to Embodiment 2 of the present invention. In FIG. 14, the same processing steps as those in FIG. As shown in FIG. 14, in the digital recording / reproducing apparatus according to the second embodiment, the information processing unit 25 controls the setting of the display of the recording date and time by the user, and the OSD unit 22 displays or does not display it. (Step S117a). For example, this is an operation mode in which the recording date / time is displayed by the OSD unit 22 only for a predetermined time after a specific operation such as start of reproduction by the user, and the recording date / time is stopped after the predetermined time has elapsed. As described above, by enabling the selection of the operation for automatically terminating the display of the recording date and time, the recording date and time can be hidden without any user operation. In the second embodiment, the points other than the above are the same as those in the first embodiment.

Embodiment 3 FIG.
FIG. 15 is a flowchart showing the operation of the digital recording / reproducing apparatus according to Embodiment 3 of the present invention. In FIG. 15, the same processing steps as those in FIG. As shown in FIG. 15, in the digital recording / reproducing apparatus according to the third embodiment, the information processing unit 25 controls the setting of display of the recording date and time by the user, and the OSD unit 22 displays and calculates the recording date and time to be displayed. By sequentially updating the results, the recording date and time information set by the OSD unit 22 is also sequentially updated (step S117b). For example, this is an operation mode in which the recording date / time is displayed by the OSD unit 22 only for a predetermined time after a specific operation such as start of reproduction by the user, and the recording date / time is stopped after the predetermined time has elapsed. As described above, the user can know the recording date and time of each screen by automatically updating the display of the recording date and time. In the second embodiment, points other than the above are the same as those in the first or second embodiment.

  In the embodiment described above, the case where the recording date / time information includes REC DATE and REC TIME has been described. However, the recording date / time information may include only REC DATE, or information other than REC DATE or REC TIME. May be included.

1 is a block diagram schematically showing a configuration of a DV stream capture system including a digital recording / reproducing apparatus according to Embodiments 1 to 3 of the present invention. FIG. 4 is a block diagram schematically showing a configuration of a digital recording / reproducing apparatus according to Embodiments 1 to 3. FIG. FIG. 10 is a diagram showing a screen display displaying the recording date and time in the digital recording / reproducing apparatus according to the first to third embodiments. 6 is a diagram showing a PACK HEADER table in a DV stream handled by the digital recording / reproducing apparatus according to Embodiments 1 to 3. FIG. 6 is a diagram illustrating a data structure of VAUX REC DATA in PACK HEADER in a DV stream acquired by the digital recording / reproducing apparatus according to Embodiments 1 to 3. FIG. 6 is a diagram illustrating a data structure of a VAUX REC TIME in PACK HEADER in a DV stream acquired by the digital recording / reproducing apparatus according to Embodiments 1 to 3. FIG. It is a figure which shows the classification method of the recording date and time of the BCD format which the digital recording / reproducing apparatus concerning Embodiment 1 thru | or 3 handles. It is a figure which shows the method of notifying the discontinuous point location of the recording date when the digital recording / reproducing apparatus which concerns on Embodiment 1 thru | or 3 performs DV dubbing, and preserve | saves recording date. It is a figure which shows the structure of the chapter data used when the digital recording / reproducing apparatus which concerns on Embodiment 1 thru | or 3 preserve | saves the video recording date / time when performing DV dubbing. FIG. 10 is a diagram illustrating a method of calculating a recording date and time when playing back a DV stream recorded by the digital recording / playback apparatus according to the first to third embodiments. 3 is a flowchart showing the operation of the digital recording / reproducing apparatus according to Embodiment 1. 6 is a flowchart showing an operation in which the digital recording / reproducing apparatus according to Embodiments 1 to 3 extracts REC DATE and REC TIME data from PACK HEADER during DV decoding. 6 is a flowchart showing an operation in which the digital recording / reproducing apparatus according to Embodiments 1 to 3 detects a discontinuous point portion of a recording date and time during DV decoding. 6 is a flowchart showing the operation of the digital recording / reproducing apparatus according to Embodiment 2. 10 is a flowchart showing the operation of the digital recording / reproducing apparatus according to Embodiment 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Monitor TV, 12 Digital recording / reproducing apparatus, 13 Digital video equipment (DV cam), 14 IEEE1394 serial bus, 15 Cable, 20, 28 interface, 21 DV codec part, 22 OSD part, 23 Display processing part, 24 Microcomputer, 25 Information processing section, 26 MPEG codec section, 27 recording section, 27a recording medium, 31 monitor TV display screen, 41 REC DATE, 42 REC TIME, 81 DV tape video / audio data, 81a, 81b, 81c continuous recording video / audio data, 82, 83, 84 Discontinuous points, 86 chapter data, 87 video and audio data recorded in a digital recording / reproducing apparatus.

Claims (10)

Information acquisition means for acquiring recording date and time information indicating the time when the digital video stream was recorded, included in the pack header of each pack constituting the input digital video stream;
Based on the recording date and time information, discontinuous point detecting means for detecting discontinuous points where the recording date and time are not continuous in the digital video stream;
Converting means for converting the digital video stream into data in a format suitable for a recording medium;
Recording means for recording the data output from the conversion means on a recording medium, and recording the recording date and time information acquired from the pack header as chapter data each time the discontinuity is detected;
A recording date and time calculating means for calculating the actual recording date and time from the recording date and time information of the discontinuous points and the time code of the recorded data when reproducing the data recorded on the recording medium;
Display information generating means for generating a recording date and time display signal for displaying the calculated recording date and time;
A digital recording / reproducing apparatus comprising: display processing means for combining and outputting the recording date and time display signal and the reproduced data.   2. The digital recording / reproducing apparatus according to claim 1, further comprising control means for controlling whether or not to perform display based on the recording date / time display signal based on a command from a user.   The digital recording / reproducing apparatus according to claim 1, wherein the display of the recording date and time of the digital video stream is updated in synchronization with the reproduced data. Information acquisition means for acquiring recording date and time information indicating the time when the digital video stream was recorded, included in the pack header of each pack constituting the input digital video stream;
Based on the recording date and time information, discontinuous point detecting means for detecting discontinuous points where the recording date and time are not continuous in the digital video stream;
Converting means for converting the digital video stream into data in a format suitable for a recording medium;
And recording means for recording the data output from the conversion means on a recording medium and recording the recording date and time information acquired from the pack header as chapter data each time the discontinuity is detected. A recording apparatus. Data converted from the digital video stream, and chapter data that is recording date and time information obtained from the pack header of each pack that constitutes the digital video stream each time a discontinuous point in which the recording date and time are not continuous in the digital video stream is detected; A recording date and time calculating means for calculating the actual recording date and time from the recording date and time information of the discontinuous points and the time code of the recorded data when reproducing data from the recording medium for recording
Display information generating means for generating a recording date and time display signal for displaying the calculated recording date and time;
And a display processing means for combining and outputting the recording date and time display signal and the reproduced data. It is included in the pack header of each pack constituting the input digital video stream, and obtains recording date and time information indicating the time when the digital video stream was recorded,
Based on the recording date and time information, detect discontinuous points where the recording date and time are not continuous in the digital video stream,
Converting the digital video stream into data in a format suitable for a recording medium;
Recording the converted data on a recording medium, and recording the recording date and time information obtained from the pack header every time the discontinuity is detected, recorded on the recording medium as chapter data,
When reproducing the data recorded on the recording medium, the actual recording date and time is calculated from the recording date and time information of the discontinuous point and the time code of the recorded data,
Generating a recording date / time display signal for displaying the calculated recording date / time;
A digital recording / reproducing method, wherein the recording date / time display signal and the reproduced data are combined and output.   7. The digital recording / reproducing method according to claim 6, wherein whether or not to perform display based on the recording date and time display signal is controlled based on a command from a user.   8. The digital recording / reproducing method according to claim 6, wherein the recording date / time display of the digital video stream is updated in synchronization with the reproduced data. It is included in the pack header of each pack constituting the input digital video stream, and obtains recording date and time information indicating the time when the digital video stream was recorded,
Based on the recording date and time information, detect discontinuous points where the recording date and time are not continuous in the digital video stream,
Converting the digital video stream into data in a format suitable for a recording medium;
Recording the converted data on a recording medium, and recording the recording date and time information acquired from the pack header as chapter data each time the discontinuity is detected. Data converted from the digital video stream, and chapter data that is recording date and time information obtained from the pack header of each pack that constitutes the digital video stream each time a discontinuous point in which the recording date and time are not continuous in the digital video stream is detected; When reproducing data from the recording medium for recording the recording date and time information of the discontinuous points and the time code of the recorded data, the actual recording date and time is calculated,
Generating a recording date / time display signal for displaying the calculated recording date / time;
A playback method comprising: synthesizing and outputting the recording date and time display signal and the played back data.

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