JP2008118508A - Recording device and recording program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device and a recording program for reproducing a voice which has been recorded at the time of moving-video recording faithfully even if the moving video is reproduced at arbitrary speed. <P>SOLUTION: By detecting operation to a slow/normal-speed switch 23 at a recording time(steps S4, S10), a slow reproduction period is acquired. Based on a slow reproduction period, voice reproduction point information for producing the voice at normal reproduction speed in synchronization with the reproduction timing of slow reproduction video data is generated (step S15). By using the voice reproduction point information generated at the recording time, the voice can be reproduced at the normal speed even in the slow reproduction portion of the video data. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a recording apparatus and a recording program that perform moving image shooting, and more particularly to a recording apparatus and a recording program that record audio together with a moving image.

  2. Description of the Related Art Conventionally, as represented by a digital video camera or the like, a recording apparatus that records a moving image and sound simultaneously has been widespread. In addition, recently, using a semiconductor as a recording medium, simultaneously recorded audio is compressed and encoded by a corresponding encoding method, packetized and multiplexed, and synchronization information is embedded in header information. Technology has also appeared.

For such a recording device, the frame rate of the moving image acquired at the time of shooting can be arbitrarily changed, and the sample rate of the recorded audio is changed according to the changed frame rate, so that the user feels uncomfortable at the time of playback. A technique of editing so as not to occur is also known (see, for example, Patent Document 1).
JP 2004-180290 A, FIGS. 19 to 21, pages 22 to 24).

  However, in the above prior art, since the audio sample rate is changed in accordance with the frame rate, there is no sense of incongruity during playback. When reproducing a moving image during a period in which the recording is changed, it is impossible to faithfully reproduce the sound at the time of recording.

  Accordingly, the present invention has been made in view of the above problems, and provides a recording apparatus and a recording program that can faithfully reproduce audio recorded at the time of recording a moving image even if the moving image is reproduced at an arbitrary speed. The purpose is to provide.

  In order to solve the above-mentioned problem, claim 1 of the present invention provides a recording start instruction means for instructing recording start of moving pictures and audio, and a moving picture recorded after the recording is started by the recording start instruction means. A playback speed input means for inputting a playback speed at the time of playback, a time information acquisition means for acquiring time information during a period in which the playback speed is input by the playback speed input means, and an instruction to end the recording of the video and audio When recording end is instructed by the recording end instruction means and the recording end instruction means, in order to reproduce the audio recorded together with the moving image at the same time when reproducing the recorded moving image with the time information, Storage means for storing the reproduction speed input by the reproduction speed input means and the time information acquired by the time information acquisition means in association with the moving image and the sound. And features.

  Further, claim 2 of the present invention further comprises changing means for arbitrarily changing the playback speed in the above-mentioned claim 1, wherein the playback speed input means is an integer of an equal multiple according to the change of the playback speed by the change means. A value of 1 / minute is input.

  According to a third aspect of the present invention, in the first or second aspect, when the recording start is instructed by the imaging unit and the recording start instructing unit, the moving image acquisition unit that drives the imaging unit to acquire a moving image. And further comprising.

  According to a fourth aspect of the present invention, when the recording start is instructed by the sound collecting means and the recording start instructing means in any one of the first to third aspects, the sound collecting means is driven to generate a sound. It further comprises voice acquisition means for acquiring.

  In order to solve the above-mentioned problem, according to claim 5 of the present invention, there is provided a recording start instructing means for instructing a computer to start recording of a moving image and audio, and after the recording is started by the recording start instructing means. Playback speed input means for inputting a playback speed at the time of playback of a moving image, time information acquisition means for acquiring time information for a period during which the playback speed is input by the playback speed input means, and instructing the end of recording of the video and audio When recording end is instructed by the recording end instructing means, and when the recording end instructing means is instructed, in order to reproduce the sound recorded together with the moving image at the same time when the recorded moving image is reproduced with the time information, Storage means for storing the reproduction speed input by the reproduction speed input means and the time information acquired by the time information acquisition means in association with the moving image and the sound. Characterized in that to function.

  According to the present invention, when the recording start of the moving image and the sound is instructed, and the reproduction speed at the time of reproduction of the recorded moving image is input after the instruction to start the recording, the time information of the input period is obtained. get. When the end of recording is instructed, when the recorded moving image is reproduced with this time information, the input reproduction speed and the acquired time are used in order to reproduce the sound recorded with the moving image at the same magnification. Information is stored in association with moving images and audio. Therefore, even if the moving image is reproduced at an arbitrary speed, the sound recorded at the time of recording the moving image can be reproduced faithfully.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Note that the constituent elements in the present embodiment can be appropriately replaced with existing constituent elements and the like, and various variations including combinations with other existing constituent elements are possible. Therefore, the description of the present embodiment does not limit the contents of the invention described in the claims.

<Configuration of video recording / playback device>
FIG. 1 is a block diagram of a moving image shooting / playback apparatus according to the present embodiment.
In FIG. 1, an imaging unit 1 performs moving image shooting. A CCD (Charge Coupled Device) imaging device that photoelectrically converts subject image light, a lens system disposed in front of the CCD imaging device, and a CCD imaging device An A / D converter that digitizes the output signal, a processing circuit that performs image processing such as gamma correction, white balance correction, and edge enhancement are included.

  The recording / playback data creation unit 2 encodes image data captured from the imaging unit 1 and audio data captured from the microphone 3.

  In the recording / playback data creation unit 2, the data recording unit 4 is, for example, a JPEG (Joint Photographic Expert Group) system, or a moving image or audio, for example, MPEG (Motion Picture Experts Group) -2 or Image data and audio data encoded in a compression encoding format that employs the predictive encoding method employed in MPEG-4 are recorded together with slow playback start / end time information as will be described later. Here, as the data recording unit 4, a large-capacity recording medium such as a DVD (Digital Versatile Disc), an HDD (Hard Disk Drive), a tape, or a flash memory is used.

  The video / audio output unit 5 is an image data encoded by a compression encoding method that employs a predictive encoding method adopted in the JPEG method, MPEG-2, or MPEG-4 reproduced from the data recording unit 4. Audio data is decoded and output. Further, the image signal and the audio signal encoded by the data recording unit 4 are sent to the monitor 6 to display a reproduced image and to output a reproduced sound.

  The control unit 7 includes a CPU (Central Processing Unit) and performs overall control of the moving image recording / reproducing apparatus of the present embodiment. A ROM (Read Only Memory) 8 stores a program for controlling the entire moving image recording / reproducing apparatus. A RAM (Random Access Memory) 9 is used as a temporary storage area.

  The operation unit 10 is a part where the user operates the moving image recording / reproducing apparatus of the present embodiment. As shown in FIG. 2, the moving picture recording / reproducing apparatus of the present embodiment includes a recording start / end switch 21, a photography switch 22, a slow / same size instruction switch 23, and the like.

  The recording start / end switch 21 is a switch for setting start and end of moving image shooting. When the recording start / end switch 21 is operated once, moving image shooting is started, and the recording start / end switch 21 is further operated. Then, the moving image shooting is finished.

  The photography switch 22 is a switch for taking a photograph. When the photography switch 22 is operated, the imaging data at that time is stored as a still image.

  The slow / equal magnification instruction switch 23 is a rotary switch for instructing slow reproduction during recording. When the slow / equal magnification instruction switch 23 is operated once, slow reproduction (for example, 1/2 speed) is performed. When the setting is made and the slow / same size instruction switch 23 is further operated, the normal size reproduction is resumed. Of course, the operation unit 10 includes other switches having normal functions such as reproduction, stop, and pause.

  Further, as shown in FIG. 3, a double speed setting switch 24 having a rotary switch structure is provided, and this double speed setting switch 24 allows any reproduction speed such as 1/2, 1/4, 1/8, etc. during shooting. As described above, the slow playback speed may be set.

  In FIG. 1, an external interface 11 is an interface for connecting an external device such as a memory card or a USB (Universal Serial Bus) device.

  As described above, in the present embodiment, as shown in FIG. 2, in addition to the recording start / end switch 21, a photography switch 22 and a slow / same size instruction switch 23 are provided. As a result, it is possible to take a picture or specify a slow playback portion while recording a moving image by recording.

  That is, as shown in FIG. 4C, when the recording start / end switch 21 is operated, moving image and audio recording processing is performed as shown in FIG. As shown in FIG. 4D, when the photography switch 22 is operated during recording, the still image at that time is captured and recorded. Also, as shown in FIG. 4E, when the slow / same size instruction switch 23 is operated, the time at this time (FIG. 4B) is captured and recorded as slow playback start / end time information. On the basis of this, synchronization information is generated so that the audio reproduction is synchronized with the moving image reproduction, and this synchronization information is recorded as the audio reproduction point information.

FIG. 5 shows a data structure of recorded data in the moving image photographing / reproducing apparatus of the present embodiment.
As shown in FIG. 5A, the recording data is recorded as filed information including header information, moving image data, and audio data. Further, when a photograph is taken, the number of photographs and photograph data are added to this data structure.

  As shown in FIG. 5B, the header information includes management information such as a moving image format, an audio format, and a recording time, and audio reproduction point information (for example, “Pa0 00:00:00”, “Pa1 00: 00:15 ”,“ Pa2 00:00:45 ”,“ Pa3 00:01:00 ”), and slow playback start / end time information (for example, 1/2 speed start 00:00:15, 1/2 speed) End 00:00:30 1/2 speed start 00:01:15, 1/2 speed end 0:01:45) is recorded. As described above, the slow reproduction start / end time information is generated by taking in the time at this time when the slow / same size instruction switch 23 is operated. The audio playback point information is generated according to the slow playback period set by the slow / same size instruction switch 23 so that the video playback and the audio playback are synchronized.

  In the present embodiment, when the slow / same size instruction switch 23 is operated during moving image shooting, the time at this time is taken in, and slow recording / playback time information is recorded. Audio playback point information is generated and recorded. At the time of reproduction, by using the audio reproduction point information, it is possible to reproduce the audio sequentially at 1 × speed in synchronization with the moving image while reproducing it slowly.

<Processing at the time of video recording / playback device recording>
FIG. 6 is a flowchart showing processing at the time of recording in the moving image capturing / reproducing apparatus of the present embodiment.

  As shown in FIG. 6, when the moving image shooting mode is set, the screen imaged by the imaging unit 1 is displayed through (directly displayed) on the monitor 6 (step S1). Then, it is determined whether or not a moving image recording instruction is detected (step S2).

  When a recording start instruction is detected in step S2 (“Yes” in step S2), the moving image data is recorded based on the image captured by the imaging unit 1, and the audio is acquired based on the sound acquired by the microphone 3. Data is recorded (step S3). Then, it is determined whether or not a slow reproduction instruction has been detected (step S4).

  If a slow playback instruction is not detected in step S4 (“No” in step S4), it is determined whether a recording end instruction is detected (step S5). If a recording end instruction is not detected (step S5). “No”), the process returns to step S3.

  In step S5, when the recording start / end switch 21 is further operated, a recording end instruction is detected. When a moving image end instruction is detected in step S5 (“Yes” in step S5), the recording of moving image data and audio data is ended (step S6), header information is generated, stored in a file (step S7). ).

  When the slow / same size instruction switch 23 is operated in step S4, a slow playback instruction is detected (“Yes” in step S4), and the slow playback start time is acquired (step S8). Then, recording of moving image data and audio data is continued (step S9), and it is determined whether or not a normal speed reproduction instruction is detected by operating the slow / same size instruction switch 23 again (step S10).

  In step S10, if the normal speed reproduction instruction due to the operation of the slow / same size instruction switch 23 is not detected again ("No" in step S10), it is determined whether a recording end instruction is detected (step S11). If no recording end instruction is detected (“No” in step S11), the process returns to step S9.

  If the normal speed reproduction instruction is detected by operating the slow / same size instruction switch 23 again in step S10 ("Yes" in step S10), slow reproduction end time information is acquired (step S12). Then, it is determined whether or not a recording end instruction is detected (step S13). If a recording end instruction is not detected ("No" in step S13), the process returns to step S3.

  In step S11, when the recording start / end switch 21 is further operated, a recording end instruction is detected. When a recording end instruction is detected in step S11 (“Yes” in step S11), the recording end instruction time is acquired as slow playback end time information (step S16), and the recording of the moving image data and audio data is ended. (Step S14), and the header information including the slow playback start time and the slow playback end time information acquired together with the end of the recording instruction acquired in step S8 and the header information including the audio playback point information generated based on these periods is added. Then, the recorded moving image data and audio data are filed and stored (step S15).

  On the other hand, when the recording end instruction is detected in step S13 (“Yes” in step S13), the recording of the moving image data and the audio data is ended (step S14), and the slow playback start time acquired in step S8 and the step By adding header information including the period of the slow playback end time information acquired in S12 and the audio playback point information generated based on these periods, the recorded moving image data and audio data are filed and stored ( Step S15).

  As described above, in the video shooting / playback apparatus according to the present embodiment, when the slow playback period is set by the slow / same size instruction switch 23 during recording, the slow playback start time and the slow playback end time are acquired. The audio playback point information is generated in synchronization with the playback timing of the video data recorded during the slow playback start time and the slow playback end time, and the video data and the audio data in which these information are recorded are When filed, it is added to the header information and filed.

  For example, as shown in FIG. 7, at the time of recording, the slow / same size instruction switch 23 is operated at time T1 to instruct the start of half-speed slow playback, and at time T2, slow / etc. It is assumed that the end of half-speed slow reproduction is instructed by operating the double instruction switch 23 again. Furthermore, it is assumed that the start of 1 / 2-speed slow playback is similarly instructed at time T3, and the end of 1 / 2-speed slow playback is instructed at time T4. Then, as shown in FIG. 8, the time T1 (for example, T1 = 00: 00: 15) is acquired as the 1 / 2-times start time, and the time T2 (for example, T2 = 00) is acquired as the 1 / 2-times end time. 0:00:30) is acquired, T1 to T2 are acquired as the 1 / 2-speed playback period. Similarly, the time T3 (for example, T3 = 00: 01: 15) is acquired as the start time of 1/2 speed, and the time T4 (for example, T4 = 00: 01: 45) is acquired as the end time of 1/2 speed. Is acquired, T3 to T4 are acquired as the 1 / 2-speed playback period.

  On the other hand, as shown in FIG. 8, the slow / same size instruction switch 23 acquires voice recording point information P0, P1, P2,... According to the operation detection timing. From the audio recording point information, audio reproduction point information Pa0, Pa1, Pa2,... Is generated so as to be synchronized with the moving image reproduction.

  That is, in the case of normal playback at 1 × speed, the audio playback point information has a predetermined time Ta (15 seconds in the present embodiment) as in the case of the audio recording point information. On the other hand, when the speed is set to ½ times, the audio playback point information in that period is twice the predetermined time Ta (for example, 30 seconds).

  That is, when the slow reproduction is instructed as shown in FIG. 7, the audio reproduction points Pa0 to Pa0 are set at the single speed from time T0 (T0 = 00: 00: 00: 00) to time T1, as shown in FIG. The interval Pa1 is a predetermined time Ta (Ta = 15 seconds), the audio playback point Pa0 is Pa0 = 00: 00: 00, and the audio playback point Pa1 is Pa1 = 00: 00: 15.

  Also, from time T1 (T1 = 00: 00: 15) to time T2 (T2 = 00: 00: 30), the speed is set to ½ times speed, so that the audio playback points Pa1 to Pa2 are 2 at a predetermined interval Ta. The audio playback point Pa1 is Pa1 = 00: 00: 15, and the audio playback point Pa2 is Pa2 = 00: 00: 45.

  Hereinafter, since the speed is 1 × until time T3, the interval between the audio playback points is an interval of a predetermined time Ta (Ta = 15 seconds).

  In addition, from time T3 (T3 = 00: 01: 15) to time T4 (T4 = 00: 01: 45), since the speed is set to ½ times speed, the audio reproduction points Pa5 to Pa6 and Pa6 to Pa7 are It becomes twice the predetermined interval Ta (for example, 30 seconds), the audio reproduction point Pa5 becomes Pa5 = 00: 0: 30, the audio reproduction point Pa6 becomes Pa6 = 00: 02: 00, and the audio reproduction point Pa7 is Pa7. = 00:02:30.

  In the following, after time T4, since the speed is 1 ×, the interval between the audio playback points is an interval of a predetermined time Ta (Ta = 15 seconds).

  Further, for example, as shown in FIG. 9, it is assumed that the start of quarter-speed slow playback is instructed at time T11 and the end of quarter-speed slow playback is instructed at time T12. Further, at time T13, the start of 1/2 × speed slow playback is instructed, at time T14, the change from 1/2 × speed to 1/4 × speed is instructed, and at time T15, 1/4 × speed slow playback is performed. Assume that termination is instructed.

  In this case, as shown in FIG. 10, time T11 (for example, T11 = 00: 00: 15) is acquired as the 1/4 time start time, and time T12 (for example, T12 = for example) is acquired as the 1/4 time end time. 00:00:30) is acquired. Further, time T13 (for example, T13 = 00: 01: 15) is acquired as the start time of 1/2 speed, and time T14 (for example, T14 = 00) is acquired as the end of 1/2 speed and the start time of 1/4 speed. : 01: 30) is acquired, and time T15 (for example, T15 = 00: 01: 45) is acquired as the end time of the slow playback at 1/4 times speed, so that T11 to T12 are set as the 1/4 speed playback period. Is acquired. Also, the time T13 is acquired as the start time of 1/2 times speed, and the time T14 is acquired as the end time of 1/2 times speed, so that T13 to T14 are acquired as the 1/2 times speed reproduction period.

  Then, as shown in FIG. 10, voice recording point information P0, P1, P2,... Is acquired every predetermined time Ta (for example, 15 seconds). From the audio recording point information, audio reproduction point information Pa0, Pa1, Pa2,... Is generated so as to be synchronized with the moving image reproduction.

  That is, in the case of normal playback at 1 × speed, the audio playback point information is at a predetermined time Ta (for example, 15 seconds) interval similarly to the audio recording point information. On the other hand, when the speed is set to ½ times speed, the audio playback point information is twice the predetermined time Ta (for example, 30 seconds). When the speed is set to ¼ times speed, the voice playback point information is The interval is four times the predetermined time Ta (for example, 1 minute).

  When the slow playback is instructed as shown in FIG. 9, as shown in FIG. 10, from the time T00 (T00 = 00: 00: 00: 00) to the time T11 (T11 = 00: 00: 15), the 1 × speed is obtained. Therefore, the interval between the audio reproduction points Pa0 to Pa1 is a predetermined time Ta (Ta = 15 seconds), the audio reproduction point Pa0 is Pa0 = 00: 00: 00, and the audio reproduction point Pa1 is Pa1 = 00: 00: 15. Become.

  In addition, from time T11 (T11 = 00: 00: 15) to time T12 (T12 = 00: 00: 30), the speed is set to 1/4 times speed, so that the audio reproduction points Pa1 to Pa2 are four times the predetermined interval Ta. (For example, 1 minute), the audio reproduction point Pa1 is Pa1 = 00: 00: 15, and the audio reproduction point Pa2 is Pa2 = 00: 01: 15.

  Hereinafter, since the speed is 1 × until time T13, the interval between the audio playback points is an interval of a predetermined time Ta (Ta = 15 seconds).

  Since the speed is set to 1/2 speed from time T13 (T13 = 00: 01: 15) to time T14 (T14 = 0: 01: 30), the audio reproduction points Pa5 to Pa6 are twice the predetermined interval Ta (for example, 30 seconds), the audio playback point Pa5 becomes Pa5 = 00: 02: 00, and the audio playback point Pa6 becomes Pa6 = 00: 0: 30.

  In addition, from time T14 (T14 = 00: 01: 15) to time T15 (T15 = 00: 01: 45), the speed is set to 1/4 times speed, so that the audio reproduction points Pa6 to Pa7 are set to 4 at a predetermined interval Ta. The audio reproduction point Pa6 becomes Pa6 = 00: 02: 30, and the audio reproduction point Pa7 becomes Pa7 = 00: 03: 30.

  In the following, after time T15, since the speed is 1 ×, the interval between the audio playback points is an interval of a predetermined time Ta (Ta = 15 seconds).

  The slow playback start time and end time acquired as described above, and the generated audio playback point are recorded as header information.

<Processing during playback of video recording / playback device>
FIG. 11 is a flowchart showing processing at the time of reproduction by the moving image photographing / reproducing apparatus of the present embodiment.

  In FIG. 11, it is determined whether or not a playback start instruction has been given (step S101). When the playback start instruction is given, header information is played back, and slow playback start / end time information and audio playback point information are acquired. (Step S102) Then, moving image reproduction is performed (step S103), and audio reproduction (step S104) is performed.

  In moving image playback, as will be described later, the playback speed is set based on the slow playback start time and end time acquired from the header information. In the audio reproduction, as will be described later, the audio reproduction is performed based on the audio reproduction point information acquired from the header information at the time of recording.

  It is determined whether or not a reproduction end instruction has been given during the moving image reproduction in step S103 and the audio reproduction in step S104 (step S105). If it is determined in step S105 that a reproduction end instruction has been given (“Yes” in step S105), the moving image reproduction and audio reproduction are terminated (step S106).

  FIG. 12 shows the moving image reproduction process in step S103. In FIG. 12, while performing moving image reproduction at a normal reproduction speed (step S111), it is determined whether or not the slow reproduction start time has been reached by referring to the slow reproduction start / end time information acquired from the header information ( Step S112). If it is determined in step S112 that the slow playback start time has been reached ("Yes" in step S112), slow playback is started (step S113). Then, with reference to the slow playback start / end time information acquired from the header information, it is determined whether or not the slow playback end time has been reached (step S114). If it is determined in step S114 that the slow playback end time has been reached (“Yes” in step S113), the process returns to step S111 and returns to normal video playback (step S113).

  Through the processing as described above, the moving image playback speed is automatically set according to the slow playback period set by the slow / same size instruction switch 23 during recording.

  FIG. 13 shows the audio reproduction processing in step S104. In FIG. 13, while performing 1 × speed audio reproduction (step S121), it is determined whether or not the next audio reproduction point has been reached (step S122). If the next audio reproduction point has not been reached (“S” in step S122). No ”), it is determined whether or not a predetermined time or more (for example, Ta + α) (α is a minute time) has passed (step S123). If the predetermined time or more has not passed (“ No ”in step S123), the audio reproduction is performed. continue.

  If it is determined that the next audio playback point has been reached before the predetermined time has elapsed ("Yes" in step S122), the playback start position is moved to the next audio playback point (step S124). And it goes to step S121 and audio | voice reproduction | regeneration is performed from the next audio | voice reproduction | regeneration point (step S121).

  If it is determined in step S123 that the audio playback point has not been reached even after a predetermined time has elapsed ("Yes" in step S123), silence is set (step S125), and the next audio playback point has been reached. Whether or not (step S126). If it is determined in step S126 that the next audio reproduction point has been reached (“Yes” in step S126), the process proceeds to step S124, and the reproduction start position is moved to the position of the next audio reproduction point. And it goes to step S121 and audio | voice reproduction | regeneration is performed from the next audio | voice reproduction | regeneration point.

  As described above, the audio playback point information is every predetermined time Ta in the case of the normal playback speed. For this reason, when normal reproduction is being performed, it is determined that the next audio reproduction point has been reached in step S122 simultaneously with the predetermined time Ta. In this case, when the reproduction start position is moved to the position of the next audio reproduction point in step S124 and audio reproduction is performed from the next audio reproduction point in step S121, audio reproduction is continuously performed.

  On the other hand, in the case of slow playback at 1/2 times speed, the audio playback point information is twice the predetermined interval Ta, and in the case of slow playback at 1/4 times speed, the audio playback point information is predetermined. It is 4 times the interval Ta. For this reason, when slow playback is being performed, it is determined in step S123 that the audio playback point has not been reached even after a predetermined time has elapsed. In this case, in steps S125 to S126, a silent section is set until the next playback point is reached. When the next playback point is reached, the playback start position is moved to the position of the next voice playback point in step S124, and voice playback is performed from the next voice playback point in step S121. Thereby, even in the slow playback portion, the sound can be played back at a speed of 1 × speed while being synchronized with the moving image.

  When the slow reproduction is instructed during recording as shown in FIG. 7, moving image data V1, V2, V3,... Are recorded as shown in FIG. In this manner, audio data A1, A2, A3,... Are recorded, and audio reproduction point information is recorded as shown in FIG. When such moving image data and audio data are reproduced, the results are as shown in FIGS. 7C and 7D.

  In other words, in this case, the recorded data in the section A in FIG. 7 is reproduced at 1 × speed. Therefore, as shown in FIG. 7C, the moving image data V1 is reproduced at a rate of 1 × speed (30 frames / second). Further, as shown in FIG. 7D, the audio data A1 is reproduced at a rate of 1 × speed at the audio reproduction points Pa0 to Pa1.

  The recorded data in the section B is reproduced at double speed. Therefore, as shown in FIG. 7C, the moving image data V2 is reproduced at a rate of 1/2 times speed (15 frames / second). Further, as shown in FIG. 7D, after the audio data A2 is reproduced at a rate of 1 × speed from the audio reproduction point Pa1, there is a silent section (indicated by hatching) until the next audio reproduction point Pa2.

  The recorded data in the sections C to E is reproduced at a single speed. Therefore, as shown in FIG. 7C, the moving image data V3, V4, and V5 are reproduced at a rate of 1 × speed (30 frames / second). Also, as shown in FIG. 7D, the audio data A3, A4, A5 are reproduced at a rate of 1 × speed at the audio reproduction points Pa2-Pa3, Pa3-Pa4, Pa4-Pa5.

  The recorded data in the sections F to G are reproduced at double speed. Therefore, as shown in FIG. 7C, the moving image data V6 and V7 are reproduced at a rate of 1/2 times speed (15 frames / second). Further, as shown in FIG. 7D, after the audio data A6 and A7 are reproduced at the single speed rate at the audio reproduction points Pa5 and Pa6, respectively, the silent period and the next audio reproduction points Pa6 and Pa7 are obtained. Become.

  The recorded data in the section H is played back at a single speed. Therefore, as shown in FIG. 7C, the moving image data V8 is reproduced at a rate of 1 × speed (30 frames / second). Further, as shown in FIG. 7D, the audio data A1 is reproduced at a rate of 1 × speed at the audio reproduction points Pa7 to Pa8.

  In addition, when a slow reproduction is instructed during recording as shown in FIG. 9, moving image data V1, V2, V3,... Are recorded as shown in FIG. , Audio data A1, A2, A3,... Are recorded, and audio reproduction point information is recorded as shown in FIG. When such moving image data and audio data are reproduced, the results are as shown in FIGS. 9C and 9D.

  In other words, in this case, the recording data in the section A in FIG. 9 is reproduced at a single speed. For this reason, as shown in FIG. 9C, the moving image data V1 is reproduced at a rate of 1 × speed. Also, as shown in FIG. 9D, the audio data A1 is reproduced at a rate of 1 × speed at the audio reproduction points Pa0 to Pa1.

  The recorded data in the section B is reproduced at 1/4 times speed. Therefore, as shown in FIG. 9C, the moving image data V2 is reproduced at a rate of 1/4 times speed. Further, as shown in FIG. 9D, after the audio data A2 is reproduced at a rate of 1 × speed at the audio reproduction point Pa1, there is a silent interval until the next audio reproduction point Pa2.

  The recorded data in the sections C to E is reproduced at a single speed. For this reason, as shown in FIG. 9C, the moving image data V3, V4, and V5 are reproduced at a rate of 1 × speed. Also, as shown in FIG. 9D, the audio data A3, A4, A5 are reproduced at a rate of 1 × speed at the audio reproduction points Pa2-Pa3, Pa3-Pa4, Pa4-Pa5.

  The recorded data in the section F is played back at 1/2 times speed. Therefore, as shown in FIG. 9C, the moving image data V6 is reproduced at a rate of 1/2 times speed. Further, as shown in FIG. 9D, after the audio data A6 is reproduced at a rate of 1 × speed at the audio reproduction point Pa5, a silent period is reached until the next audio reproduction point Pa6.

  The recorded data in the section G is reproduced at 1/4 times speed. For this reason, as shown in FIG. 9D, the moving image data V7 is reproduced at a rate of 1/4 times speed. Further, as shown in FIG. 9D, after the audio data A7 is reproduced at a rate of 1 × speed at the audio reproduction point Pa6, there is a silent period until the next audio reproduction point Pa7.

  The recorded data in the section H is played back at a single speed. Therefore, as shown in FIG. 9C, the moving image data V8 is reproduced at a rate of 1 × speed. Further, as shown in FIG. 9D, the audio data A1 is reproduced at a rate of 1 × speed at the audio reproduction points Pa7 to Pa8.

  Thus, in the present embodiment, the interval between the audio playback point information Pa0, Pa1, Pa2,... Is a predetermined time Ta (for example, 15 seconds) in the case of 1 × speed, and in the case of 1/2 speed. It is twice the predetermined time Ta (for example, 30 seconds), and in the case of 1/4 speed, it is four times the predetermined time Ta (for example, 60 seconds). The audio data A1, A2, A3,... Are reproduced at a single speed in synchronization with the audio reproduction information Pa0, Pa1, Pa2,. As a result, when slow reproduction is performed, the synchronization between the moving image data and the audio data is maintained.

  In the above-described example, in the slow playback period, the sound is played back at a normal speed for a predetermined time, and then the sound is played back until the next sound playback point. Also good.

  In addition, in the example of FIG. 11, the case where the audio reproduction point information generated at the time of recording is acquired from the header information and the audio information and the moving image information are divided is described. If the time is acquired, the audio playback point information may be generated at the time of playback.

  Further, in the above-described example, the slow playback start / end time information is recorded in the header according to the slow playback period set by the slow / same size instruction switch 23 at the time of recording, and the slow playback acquired from this header at the time of playback. Although the playback speed of the moving image is set based on the start / end time information, the frame rate may be set according to the playback speed during recording. That is, for example, in the period set to ½ times speed, images of the same frame are recorded twice continuously during recording, and in the period set to ¼ times speed, images of the same frame are recorded during recording. You may make it record four times continuously. In this case, it is not necessary to record slow playback start / end time information in the header information, and it is not necessary to set the playback speed during playback.

  As described above, according to the present embodiment, when the slow / same size instruction switch 23 is operated during recording of moving image data and audio data, the period of moving image data to be reproduced during reproduction based on the operated period. Can be specified. Also, audio playback point information for reproducing the recorded audio data at the same magnification from the instructed playback speed and the above period is generated and embedded in the header in association with the recorded moving image data and audio data. Since the data is filed, when the moving image data and audio data that have been filed are reproduced on the reproduction device side, it is only necessary to reproduce the audio based on the audio reproduction point information.

  Further, the playback speed can be arbitrarily changed even during recording by the double speed setting switch 24, and it is a fraction of an integer such as 1/2, 1/4, 1/8,. Therefore, there is an advantage that it is easy to generate a timing when returning to the same size reproduction when reproducing the audio data.

  In addition, since the imaging unit 1 is provided, it is possible to arbitrarily specify, for example, a period during which slow playback is desired during shooting, so that it is possible to save the trouble of searching for an important scene during playback and performing slow playback.

  In addition, since the microphone 3 is provided, it is possible to faithfully reproduce the sound collected during shooting and the sound during recording even during slow reproduction.

  Note that the recording apparatus of the present invention can be realized by recording the processing of the recording apparatus on a computer-readable recording medium, causing the recording apparatus to read and execute the program recorded on the recording medium. The computer system here includes an OS and hardware such as peripheral devices.

  Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW (World Wide Web) system is used. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes a design and the like within a scope not departing from the gist of the present invention.

  The present invention can be widely applied to audio processing during variable speed reproduction in a recording apparatus that records a moving image on a large-capacity recording medium such as a DVD, HDD, tape, or flash memory.

It is a block diagram which shows the structure of the moving image recording / reproducing apparatus of embodiment of this invention. It is explanatory drawing of an example of the operation part in the moving image recording / reproducing apparatus of embodiment of this invention. It is explanatory drawing of the other example of the operation part in the moving image recording / reproducing apparatus of embodiment of this invention. It is a timing diagram used for operation | movement description of the moving image recording / reproducing apparatus of embodiment of this invention. It is explanatory drawing which shows the structure of the recording data in the moving image recording / reproducing apparatus of embodiment of this invention. It is a flowchart used for description at the time of video recording of the video recording / reproducing apparatus of the embodiment of the present invention. It is a timing chart used for description of an example of a timing relationship between moving image reproduction and audio reproduction in the moving image recording / reproducing apparatus of the embodiment of the present invention. It is explanatory drawing of an example of the production | generation of the audio | voice reproduction | regeneration point in the moving image recording / reproducing apparatus of embodiment of this invention. It is a timing diagram used for description of another example of the timing relationship between moving image reproduction and audio reproduction in the moving image recording / reproducing apparatus of the embodiment of the present invention. It is explanatory drawing of the other example of the production | generation of the audio | voice reproduction | regeneration point in the moving image recording / reproducing apparatus of embodiment of this invention. It is a flowchart used for description at the time of reproduction | regeneration of the moving image recording / reproducing apparatus of embodiment of this invention. It is a flowchart used for description of the moving image reproduction process of the moving image recording / reproducing apparatus of the embodiment of the present invention. It is a flowchart used for description of the audio | voice reproduction | regeneration processing of the moving image recording / reproducing apparatus of embodiment of this invention.

Explanation of symbols

1: imaging unit,
2: Reproduction data creation unit,
3: Microphone
4: Data recording part,
5: Audio output unit,
6: Monitor,
7: Control unit,
8: ROM,
9: RAM,
10: operation unit,
11: External interface,
21: Recording start / end switch,
22: Photography switch
23: Slow / same size instruction switch,
24: Double speed setting switch

Claims (5)

Recording start instruction means for instructing the start of recording of video and audio;
Playback speed input means for inputting a playback speed at the time of playback of the recorded moving image after the recording is started by the recording start instruction means;
Time information acquisition means for acquiring time information of a period during which the reproduction speed is input by the reproduction speed input means;
Recording end instruction means for instructing the end of recording of the moving image and the sound;
When the recording end instruction is instructed by the recording end instruction means, the playback speed input means causes the audio recorded with the moving image to be reproduced at the same magnification when the recorded moving image is reproduced with the time information. Storage means for storing the input reproduction speed and the time information acquired by the time information acquisition means in association with the moving image and the sound;
A recording apparatus comprising: It further comprises changing means for arbitrarily changing the playback speed,
2. The recording apparatus according to claim 1, wherein the reproduction speed input means inputs a value equal to an integral multiple of 1 in accordance with the change of the reproduction speed by the changing means. Imaging means;
The recording apparatus according to claim 1, further comprising a moving image acquisition unit that drives the imaging unit to acquire a moving image when the recording start instruction unit instructs the recording start. Sound collection means;
4. The recording according to claim 1, further comprising a sound acquisition unit that drives the sound collection unit to acquire a sound when the recording start instruction unit instructs the recording start. 5. apparatus. Computer
Recording start instruction means for instructing the start of recording of video and audio
A reproduction speed input means for inputting a reproduction speed at the time of reproduction of the recorded moving image after the recording is started by the recording start instruction means;
Time information acquisition means for acquiring time information of a period in which the reproduction speed is input by the reproduction speed input means;
Recording end instruction means for instructing the end of recording of the moving image and the sound;
When the recording end instruction is instructed by the recording end instruction means, the playback speed input means causes the audio recorded with the moving image to be reproduced at the same magnification when the recorded moving image is reproduced with the time information. Storage means for storing the input reproduction speed and the time information acquired by the time information acquisition means in association with the moving image and the sound;
A recording program characterized by functioning as

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