JP2696843B2 - Playback method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reproducing a recording medium capable of recording audio and video. [Prior art] Conventionally, a VTR is known as a device for recording / reproducing a video signal and an audio signal. However, recently, a disk-shaped magnetic recording medium is newly used, and a still image, an audio signal, and the like are magnetically recorded thereon. A recording still video system was devised and a unified standard was published. [Problems to be Solved by the Invention] In the recording format of the unified standard, the reproduction order of the sound and the image corresponding thereto is defined for one continuous sound sequence. , The order of reproducing the plurality of audio sequences is not specified. Further, when reproduction is performed according to the audio sequence, there is a problem that a still image that does not support audio is not reproduced. As described above, when a plurality of audio signals and a plurality of video signals are mixedly recorded on a recording medium, it is difficult to reproduce the two signals in good order. Therefore, an object of the present invention is to provide a reproducing method capable of flexibly instructing a reproducing procedure in a recording / reproducing system of the above type. [Means for Solving the Problems] In the reproduction method according to the present invention, information relating to the reproduction order is added and recorded to each of the audio signals of a plurality of sequences and the image signals of a plurality of screens. A method of reproducing from a recording medium in which control information indicating a combination of an audio signal and an image signal of a sequence to be reproduced in combination is recorded, while simultaneously reproducing the audio signal and the image signal, When automatically reproducing the plurality of sequences sequentially, whether to automatically perform sequential automatic reproduction according to information related to the reproduction order added to the audio signal or to perform sequential automatic reproduction according to information related to the reproduction order added to the image signal It can be selected by the user. Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a signal reproduced from a video floppy disk 10 by a magnetic head 12 is supplied to an FM demodulation circuit 14 and FM demodulated. When the magnetic head 12 is tracing the recording track of the video signal, the video signal component of the demodulated signal is supplied to the output terminal 20 via the non-linear deemphasis circuit 16 and the reproduction circuit 18. When the magnetic head 12 is tracing the recording track of the audio signal, the audio signal component of the demodulated signal by the FM demodulation circuit 14 is applied to the A / D converter 24 via the linear characteristic de-emphasis circuit 22. A / D converter 24 is oscillator 26
Is converted to a digital signal at the timing of the output, and the digital signal is stored in the memory 28 at the same timing. 30 is the address counter. The audio signal stored in the memory 28 is read out according to the read address of the address counter 30 which changes at the timing specified by the oscillation frequency of another oscillator 32, and at that timing, the D / A converter 34 converts it into an analog signal. The data is converted, decoded by the decoder 36, and output from the output terminal 38. In addition, 40 is a system controller for overall control, 42 is a drive motor for the disk 10, 44 is a head drive circuit, 46 is a head drive motor, 48 is a PG coil for detecting the rotational phase of the disk 10, 40 Is an information signal detection circuit,
52 is an identification signal detection circuit, 54 is a timing signal generation circuit,
Reference numeral 56 denotes a memory for a table for storing various information related to recording signals of the disk 10, 58 a monitor device, 60 a keyboard device, and 62 a synchronization signal separation circuit. FIG. 2A shows an operation flow chart of the system controller 40, and FIG. 2B shows details of the reproduction routine of FIG. 2A. Next, the operation of the illustrated apparatus will be described with reference to FIGS. 2A and 2B. When the video floppy disk 10 is loaded, the system controller 40 clears the table memory 56 (S201) and moves the magnetic head 12 to the innermost track (S202). Then, data related to the track, such as a control code, is reproduced (S20).
3) The data is stored in the corresponding storage location of the table memory 56 (S204). This operation is performed for all tracks on the disk 10 (S203 to S206). When the creation of the data tables for all the tracks is completed, the video stored in the outermost track is reproduced based on the table and output to the monitor device 58. In this state, input from the keyboard device 60 is possible, and conditions for various playback modes are input from the keyboard device 60 (S20).
8). When a request to start playback is input from the keyboard device 60, the video or audio recorded on the disk 10 is played back in the playback mode selected at that time (S210). In the reproduction routine (FIG. 2B), the number of the recording track that satisfies the reproduction mode condition is extracted from the track information table created when the disc 10 is loaded. That is, when reproducing audio, the audio track number in the information table indicated by the information table access counter is taken out (S211), the magnetic head 12 is moved to the track of that number, and the audio recording signal is reproduced. And memory
It is stored in 28 (S212). From the control code data reproduced simultaneously with the audio signal, the track position where the video corresponding to the audio signal is recorded can be known, and the magnetic head 12 is moved to the video recording track,
The video is also played (S213). If the audio signal stored in the memory 28 is not being reproduced in real time, the reproduction in real time is started (S214, 215),
The remaining sound signal stored in the memory 28 is reduced,
Until it becomes necessary to play the continuation of this audio,
It waits while monitoring the value of the counter 30 (S217). Then, the control played back during the previous audio signal playback
From the code, check the track where the subsequent audio signal is recorded, move the magnetic head 12 to that track, and
Steps S212 to S218 are repeated until the end of a series of audio signals. The end of the audio signal can be determined by a flag added before and after the audio signal when recording on the track. When it is no longer necessary to continue the reproduction from the audio signal track, it waits until all the audio signals stored in the memory 28 are reproduced in real time (S219) and resets the value of the information table access counter. The reproduction operation ends after incrementing or decrementing. Next, the reproduction mode will be described. Table 1 is a correspondence table between the audio reproduction switch and the video reproduction switch provided in the keyboard device 60 and the reproduction mode of the recording signal of the disk 10. That is, in the reproduction mode # 1, all of the audio and the video are reproduced, in the reproduction mode # 2, only the audio is reproduced, and in the reproduction mode # 3, only the video is reproduced. Further, the keyboard device 60 includes an audio / video priority switch. This switch is used to specify which of audio and video reproduction is to be prioritized. As an example, as shown in Table 2, when video and audio are recorded on the disk 10, the reproduction order is as shown in Table 3 according to the reproduction mode. Table 2
At 5, V indicates video and A indicates audio. The suffix of V represents a track number, the suffix of A represents a sound sequence number, and the superscript of A represents the reproduction order in the sound sequence. In the video priority mode, the reproduction according to the audio sequence is performed from the time when the video track corresponding to the head track of the audio sequence is reproduced. In the audio priority mode, the reproduction according to the audio sequence is performed from the time when the head track of the audio sequence is accessed. In addition, a video that does not support audio is reproduced in each mode in order from the outer track. Note that this is an example in which the track to be accessed from the outer track to the inner track is changed. When the track to be accessed from the inner track to the outer track is changed, the reproduction order in Table 3 is reversed. become. In the example shown in Table 3, when the video reproduction switch is OFF and the audio reproduction switch is ON, the video is not output to the video monitor device 58 corresponding to the audio. May be output. Next, the search of the audio sequence will be described with reference to Tables 4 and 5. When a search switch provided on the keyboard device 60 is pressed, the system controller 40 automatically turns on the sound reproduction switch. A When not performing audio reproduction operation, when the video V ₈ is displayed on the monitor device 58 in the video priority mode, in the case of search to the inner circumferential side, the video V ₈ for voice A ₂ ¹ because corresponds again to display the image V ₅ corresponding to a ₁ ^1, the standby state. In the case of search to the outer circumference side, A ₃
The standby state is displayed on the video V ₂ corresponding to the ^1.
The audio priority mode, if the search to the inner circumferential side and to the standby state by displaying video V ₂ corresponding to A ₃ ^1, if the search to the outer peripheral side, the video V ₅ corresponding to A ₁ ¹ Display and enter standby mode. Further, during voice reproduction, when the video V ₈ is displayed on the monitor device 58, in each playback mode, search
The search destination by the switch is the same as the above case,
Reproduction is continued from the search destination. Although not mentioned in the above description, if there is an empty track on the disk 10, that track is skipped during the reproducing operation. Track access is performed cyclically. After accessing the innermost track, the outermost track is accessed, or vice versa. In the above embodiment, no video signal memory is provided. However, by providing an image memory capable of storing one screen of video signal, it is necessary to always reproduce the video signal from the video disk in the instruction waiting state. Disappears, video
Damage to the disk is reduced, and moreover, time is allowed for the next track access. Further, in this embodiment, three types of switches are used for selection of the reproduction mode. However, a rotary switch or the like may be used as a display for directly selecting the reproduction mode. [Effects of the Invention] As can be easily understood from the above description, according to the present invention, when reproducing a plurality of sequences of audio signals and a plurality of screens of image signals recorded on a recording medium, the sequences to be reproduced in combination are reproduced. A plurality of sequences of audio signals can be automatically and sequentially reproduced while simultaneously reproducing the audio signal and the image signal. Further, at the time of such sequential automatic reproduction, the reproduction order of a plurality of sequences can be selected according to either the information relating to the reproduction order added to the audio signal or the information relating to the reproduction order added to the image signal, and the reproduction order can be flexibly adjusted. Can be set.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIGS. 2A and 2B are operation flow charts of the system controller 40 shown in FIG. 10 video disk, 12 magnetic head, 20 video output terminal, 38 audio output terminal, 42 disk drive motor

Claims (1)

(57) [Claims] Information relating to the reproduction order is added and recorded to each of the audio signals of the plurality of sequences and the image signals of the plurality of screens, and indicates a combination of the audio signal and the image signal of the sequence to be combined and reproduced for the user. A method for reproducing from a recording medium on which control information is recorded,
When simultaneously reproducing the audio signal and the image signal simultaneously and automatically reproducing the plurality of sequences, the automatic reproduction is sequentially performed according to the information related to the reproduction order added to the audio signal, or the video signal is added to the image signal. Wherein the user can select whether to sequentially perform automatic reproduction in accordance with the information on the reproduction order.