JP2550961B2 - Video and audio signal recording method and recording apparatus therefor - Google Patents

Description

The present invention relates to a video and audio signal recording method and a recording apparatus therefor, and particularly to a suitable video and audio signal recording method applied to an 8 mm video tape recorder and the like. Recording device

[Outline of Invention]

The present invention relates to a video and audio signal recording method and a recording apparatus therefor, wherein a video signal and a channel number signal related to the video signal are recorded on a plurality of inclined tracks on a magnetic tape, and a plurality of inclinations different from the plurality of inclined tracks are recorded. At the time of reproduction, by recording the audio signal and the channel number signal associated with the video signal in the audio signal recording section of a plurality of channels obtained by dividing the track into a plurality of pieces along the longitudinal direction thereof, respectively. This is to enable quick reproduction of a desired audio signal corresponding to a video signal.

[Conventional technology]

The 8 mm video tape recorder mainly includes an 8 mm video standard for recording / reproducing video signals, a PCM audio standard for recording / reproducing audio signals adopted in addition to the standard, and a multi-purpose audio recording / reproducing system. truck
There is a PCM audio standard.

First, the track format of the 8 mm video standard (including the PCM audio standard) will be described with reference to FIG. From the right side where the rotary head begins to come into contact with the magnetic tape, first, the rotation angle of the head to the tip is 5 degrees, which is the rush section (11) and the preamble section (12).
2.06 degrees in the latter half of 1) [3H of video signal (H is horizontal period)
The period [corresponding to minutes] is set as a preamble portion (12) which is a portion of a clock line synchronized with the subsequent PCM data portion. Following this preamble part (12), a recording area of a PCM data part (13) of a time axis compressed audio signal is provided over 26.32 degrees. The 2.06 degree (3H) period following the recording area of this PCM data section (13) is an after-recording margin section (14) that serves as a back margin for recording position deviation during after-recording, and 2.62 degrees (3.
8H) is used as a guard section (15) for the video signal section (16) and the PCM data section (13). Then, a recording area for one field of the video signal (16) including the vertical synchronizing signal position (16a) of 6H is provided 180 degrees after the guard section (15). Further, the subsequent 5 degrees is set as the separating portion (17).

Next, the track format of the multi-track PCM audio standard will be described with reference to FIG. One sloping track is divided into six, and one PCM audio signal division area is exactly the same as the PCM audio signal area of the normal 8 mm video track format shown in FIG. 7, and the inrush part (21) and preamble part (22), PCM data section (2
3), an after-recording margin section (24), and a guard section (25), which are assigned to each of the divided areas AP _{1 to} AP ₆ .

[Problems to be solved by the invention]

The present invention skillfully uses the 8 mm video and multi-track PCM audio standards of the 8 mm video tape recorder to display a desired video signal recorded by the user or the like as a still image on the screen of the cathode ray tube, and the still image is displayed. (EN) Provided are a video and audio signal recording method and a recording apparatus thereof capable of selectively reproducing an audio signal which matches the above.

[Means for solving problems]

The video and audio signal recording method and the recording apparatus according to the present invention include a video signal on a plurality of inclined tracks (4), (5) and (6) on a magnetic tape (2) and the video signal (4) as shown in FIG. ) (5) (6) related channel number signals (9a) (9b) (9c) are recorded and a plurality of tilted tracks (7) different from the plurality of tilted tracks (4) (5) (6).
Of the audio signals associated with the video signals (4), (5) and (6) respectively in the audio signal recording units of the plurality of channels (10a) (10b) (10c) obtained by being divided into a plurality along the longitudinal direction of the Signal and above channel number signal (9a) (9b) (9c)
It is designed to record.

[Action]

According to the present invention, a favorite video signal is recorded, and an audio signal related to the favorite video signal is reproduced by the channel number signal recorded at the same time as the recorded video signal. It can be displayed on a cathode ray tube.

〔Example〕

An embodiment of a video / audio signal recording method and a recording apparatus thereof according to the present invention will be described below in detail with reference to FIGS. 1 to 4.

FIG. 1 is a track pattern showing an embodiment of a video and audio signal recording system of the present invention, FIG. 2 is a system diagram showing an embodiment of the present invention, and FIGS. 3 and 4 are discrimination word data. FIG.

First, an outline of an example of the track pattern of the method of the present invention will be described with reference to FIG. 1, in which a track (1A), (1B) (see FIG. 2) which is tilted by scanning of rotary heads (1A) and (1B) on the magnetic tape (2) ( 3) is formed.

The video signal (16) is recorded on the beginning part of the magnetic tape (2), for example, based on the track format of 8 mm video described in FIG. 7, that is, (4),
Video signals having different tastes are recorded in a set of a plurality of tracks indicated by (5), (6), ....

(11) to (15) described in FIG. 7 are PCM audio signal parts recorded during 8 mm video recording. For example, the discrimination word part (described later) in the PCM data part (13) in this PCM audio signal part. However, 6 words are prepared for 1 field.) Channel number signals (9a) (9b) (9c) ...
To record.

The channel number signals (9a) (9b) (9c) ... Have different numbers for each set (4), (5), (6) of a plurality of tracks on which different video signals are recorded. There is.

8mm video multi-track set (4), (5),
Following (6), audio signals based on the multi-track PCM audio format detailed in FIG. 8 are recorded on a plurality of tracks (7), and six channels (10a), (1
0b), (10c), (10d), (10e), and (10f) are formed, and an audio signal that matches the video signal recorded on a set of multiple tracks is recorded on each channel. The recorded channel number signals (9a), (9b),
(9c) is recorded, for example, in the discrimination word data section in the PCM data section (13).

An apparatus for recording and / or reproducing video and audio signals as described above will be described with reference to FIG.

In Fig. 2, (26) is an input terminal for the video signal, and the video signal input to this terminal (26) is not only the video output signal of the 8 mm video camera but also the moving picture such as the television reception signal, the still image. You can select the image signal.

The video signal is amplified by an amplifier circuit (28) and then input to a memory system path described later and a system path for continuously recording the video signal through a movable contact C of a switching means (29). One fixed contact a of the switching means (29) is an analog-
It is connected to a digital conversion circuit (hereinafter referred to as A / D) (30), and the other fixed contact b is connected to the addition circuit (35). The switching means (29) is controlled by a system controller (34) which will be described later, and an image memory system path for storing a video signal for one frame and taking out a still image, and a system for continuously recording the video signal. Switch to the road.

The video signal digitally converted by the A / D (30) is stored in the memory (3
Added in 1). This memory (31) requires a recording capacity enough to record at least one frame (or one field), and the output of this memory (31) is a digital-analog conversion circuit (hereinafter referred to as D / A) (32 ) And the output of the D / A (32) is added to the adder circuit (35).

The output of the adder circuit (35) is added to a low-pass filter circuit (hereinafter referred to as LPF) (36) and a band-pass filter circuit (hereinafter referred to as BPF) (37) to separate into a luminance signal and a chrominance signal system. The output of the LPF (36) is added to the FM modulation circuit (38) through an AGC circuit, a clipping circuit, etc. (neither is shown).
FM modulated.

The output of the BPF (37) is a frequency conversion circuit (hereinafter referred to as CONV) for making a low-frequency conversion carrier color signal from the video signal (39).
Is added to the output of the FM modulation circuit (38), added to the switching means (40), and passed through the rotary transformer (41) to the first and second rotary heads ( 1A) and (1B). The first and second rotary heads (1A) and (1B) rotate along the peripheral surface of the tape guide drum, and from the supply reel (43) to the take-up reel (44).
Since the magnetic tape (2) wound around the drum is wound around the drum surface over a range of 221 °, the first and second magnetic tapes are
Magnetic tape (2) by rotating head (1A), (1B)
The inclined track (3) shown in FIG.

In order to reproduce the video signal (16) thus recorded on the magnetic tape (2), the first and second rotary heads (1
The video signals reproduced by A) and (1B) are taken out via the rotary transformer (41), added to the amplification circuit (45), and passed through the switching means (46) to the high-pass filtering circuit (hereinafter,
HPF) (47) and LPF (48).

HPF (47) takes out the FM luminance signal from the playback signal,
The limiter circuit (49) removes the level fluctuation, and then the FM demodulation circuit (51) demodulates the FM luminance signal into a luminance signal and adds it to the addition circuit (52).

The low frequency conversion carrier color signal is extracted from the video signal input to the LPF (48) and added to the CONV (50). This CONV
The reverse operation of CONV (39) on the recording side of (50) is performed, converted into the original carrier color signal and added to the addition circuit (52).

The output terminal of the adder circuit (52) is connected to, for example, the fixed contact b of the switching means (57) and the A / D (53).

The output of the A / D (53) is added to the digital memory (54), the output of the memory (54) is added to the D / A (55), and the output of the D / A is, for example, fixed to the switching means (57). It is output to the output terminal (58) through the contact a and the movable contact c.

The normal video signal is the fixed contact b of the switching means (57).
It is output to the output terminal (58) via the movable contact piece c which is tilted to the side.

The switching means (29), (57) or the memory controllers (33), (56) are controlled by the system controller (34), and the memory controllers (33), (56) are A / D (3.
0), (53), and D / A (32), (55) as well as memory (3
1) and (54) are controlled.

Next, the case of recording or reproducing an audio signal by the multi-track PCM audio system (including the case of recording or reproducing the audio signal (23) in the PCM data part (13) by the 8 mm video system) will be described in detail.

Audio signals from a compact disc player, tape recorder, tuner, etc. are added to the input terminal (59),
In the case of stereo etc., there are left and right signals, but here only one channel is shown.

The audio signal applied to the input terminal (59) is amplified by the amplifier circuit (6
0), and its output is an LPF (not shown) for band limiting
And through the noise reduction circuit (61), A / D (62)
Is added to and digitally converted. The digital signal from this A / D (62) is supplied to the pulse processing circuit (63),
Together with the audio signal data 2 field time period is time-compressed in one divided area fraction (one of the AP ₁ ~AP _6), error correction code addition, the channel number generation performs 8-10 conversion processing For example, a channel number is added to the discrimination word data from the circuit (65). Pulse processing circuit (63)
The output of is, for example, a signal distributed on the high frequency side in the FSK modulation circuit (64), and is applied to the rotary heads (1A) (1B) via the switching means (40) and the rotary transformer (41).
Recording of the audio signal (23a) is made in the PCM data of the divided area AP ₁ ~AP ₆ shown in FIG. 1 (23).

The audio signal recorded on the magnetic tape (2) is reproduced by the rotary heads (1A), (1B), and its output is applied to the amplifier circuit (67) through the rotary transformer (41) and through the switching means (46). Supplied to the FSK demodulation circuit (68), PCM
The signal is demodulated, and the pulse processing circuit (69) performs time-axis expansion, error correction, interpolation, 8-10 conversion processing, and the like.

The memory (70) is a RAM or R used to perform these processes.
A channel number is detected by the channel number detection circuit (74) from the determination word data, and the detection output signal is input to the system controller (34).

The output of the pulse processing circuit (69) is converted into an analog signal by the D / A (71), and the audio signal is output to the output terminal (73) through the noise reduction circuit (72) and the analog audio signal from the normal speaker. Is emitted.

The input terminal of the channel number generation circuit (65) is connected to the output terminal of the system controller (34), and the channel number generation circuit (65) is connected to the system controller (34) based on the designation of the channel selection means (66) such as a numeric keypad. ) Via a channel number signal.

The output of the channel selection means (66) is also added to the system controller (34), and the system controller (34)
Output of the take-up or supply reels (44), (43) as well as the drive motor (77) of the capstan (75)
To the servo circuits (79) and (80), respectively.

(76) is a pinch roller which feeds the magnetic tape (2) in the direction of arrow AA at a constant speed in cooperation with the capstan (75).

The video and audio signal recording method and the recording apparatus thereof according to the present invention in the above configuration will be described.

The recorder operates the channel selection means (66) on a desired screen and presses a predetermined key on the numeric keypad while watching the video signal monitored on the screen of the negative tube from the tuner or the 8 mm video camera. . For example, when the "1" key is pressed, the channel number signal (9a) is generated in the channel number generation circuit (65), and the 8 mm video track, for example, a plurality of tracks (4) in FIG. The channel number signal (9a) is added to the pulse processing circuit (63) to record the channel number signal (9a) in the recording area AP ₁ of the PCM audio signals (11) to (15) (see FIG. 7). .

Here, the data structure of the PCM audio signal when the video signal of 8 mm video coexists and the PCM audio signal in the case of multi-track PCM audio will be described. The PCM data section (Fig. 7 and Fig. 8) The data for one field in 13) and (23) consists of 132 blocks, and one block consists of 8 words, which is 1056 words. One word has 8 bits.

Of the 1056 words, 1050 words are PCM audio data, and the other 6 words are added with data called ID _{0 to} ID ₅ . These determination word data are arranged at the beginning of the PCM audio data at intervals of 44 blocks every 2 words.

 In addition, it also has CRC and parity P and Q arrays.

The word data ID _{0 to} ID ₅ for the above-mentioned 6-word discrimination are configured as shown in FIG. That is, the identification word data ID
Each of _{0 to} ID ₅ is composed of 8-bit bit data B _{0 to} B ₇ . ID _{0 to} ID ₄ are utility world data, of which ID is ₀ mode codeword data, ID _{1 to} I
D ₄ is data codeword data (display codeword data).

The data code word data ID _{1 to} ID ₄ are written according to the mode written in the mode code data ID ₀ .

6 modes are currently registered for 8mm video
The contents are as shown in FIG.

Further, ID _{5 is this} control word data, and various control data are represented by the value of each bit data. First, when the bit data B ₇ is 1, it indicates dubbing protection (dubbing protection as a digital signal). Bit data B _5, B _6, according to this value, represented the recording start and end points and recording period. Bit data B ₃ and B ₄ are set to channel 1 (CH
1), whether the audio of channel 2 (CH2) or other information is displayed. The bit data B ₁ and B ₂ are represented as monaural, stereo, bilingual and other types by the value thereof. The bit data B ₀ indicates whether the other bit data B _{1 to} B ₇ are valid or invalid according to 1 or ₀ .

Since there is a margin in the mode codeword as mentioned above,
The channel number signal can be encoded in the pulse processing circuit (63).

Returning to FIG. 2, for continuing the explanation, the system control (34) operates the switching means (29) to tilt the movable contact piece c to the fixed contact a or b side. If it is now turned to the fixed contact a side, the video signal of the still image is stored in the digital memory (31) via the A / D (30).

Of course, at this time, the system controller (34) also outputs a control signal to the memory controller (33), and the memory controller (33) controls the A / D (30) memory (31) and D / A (32).

When the movable contact piece c is tilted to the fixed contact b side, a normal moving image signal is recorded on the magnetic tape (2).

In this way, when the recording of the channel number signal (9a) by the channel number designation and the recording of the video signal of the moving image or the still image signal written in the memory are completed, the system controller (34) causes the drive motor (77) of the capstan. ) And a drive signal for driving a winding (or supply) reel drive motor (78), a control signal is applied to the servo circuits (79) and (80) to record a multi-PCM audio signal on the magnetic tape (2). Move to a position, that is, a certain position of the plurality of tracks (7).

Here, to a predetermined empty channel, for example, in FIG.
The PCM audio signal (23a), which is music that matches the desired still image, is recorded on the first channel (10a). Of course, at this time, the pulse processing circuit (63) determines the mode code word data of the word data. The same channel number (9a) as recorded in the PCM audio signal area AP ₁ co-located with the video signal is recorded in.

By the recording method as described above, the video signal (16) and the channel number signals (9a), (9b) of a plurality of track groups (4), (5), (6) ... ),
(9c) ... is recorded, and multi-track is recorded after these tracks.
Multiple tracks (7) of the PCM audio system are recorded, and audio signals (23a) are recorded on each channel (10a) to (10f).
And channel number signals (9a), (9b), (9c) ... Are recorded.

Next, the operation during reproduction will be described. As shown in FIG.
Of the multiple track sets (4), (5), (6) in which the video signal (16) is recorded, the preferred video signal (16)
Is displayed on the negative tube, a predetermined key (for example, channel freeze key) of the ten keys of the channel selection means (66) is pressed, and the switching means (57) is generated by the control signal from the system controller (34). The movable contact c is switched to the fixed contact a side, and the memory controller (56) also operates according to the control signal from the system controller (34) to output a still image when the channel freeze key is pressed from the memory (54) to the output terminal. It is output to (58).

At this time, a set of a plurality of tracks (4), (5), (6)
Channel number signal (9a) recorded in ...
(9b), (9c) ... Are detected by the pulse processing circuit (69) and the channel number detection circuit (74), and the detection output signal is added to the system controller (34).

The system controller (34) is the servo circuit (79),
The drive motors (77) and (78) are drive-controlled through (80) to make them fast-forward or fast-rewind, and move to a position where there are multiple tracks (7) on which multi-PCM audio signals are recorded.
The channel number detection circuit (74) detects the predetermined channel number signals (9a) (9b) (9c) ... Of the channels (10a) to (10f) of this track, and the channel sound with the channel number signal is detected. It is designed to reproduce the signal.

In the above-described embodiment, multi-PCM is used for each video signal recording.
The case where the audio signal is returned to the audio signal track side to record the audio signal has been described, but a group of a plurality of tracks (4), (5), (6)
Specify a plurality of predetermined patterns at the same time, write the channel number, and fast forward or reverse fast forward the magnetic tape to the multi-PCM audio signal track side so that the audio signals of 6 songs are recorded at the corresponding channel number positions. May be.

Further, in the above-mentioned embodiment, the first to nth channel number signals (9a) to (9n) are written in the discrimination word data, but these ID _{0 to} ID ₄ can be recorded or erased on the magnetic tape afterwards. Therefore, there is no dubbing margin part (14), (24) or guard part (15) shown in FIGS. 6 and 7,
The ID may be recorded in (25) or the like.

FIG. 5 shows another method of recording the channel number, which is an audio auxiliary track (8) for the magnetic tape (2).
Channel number (9a) (9b) (9c) ... is recorded on a predetermined part such as a) or cue auxiliary track (8b), and this is recorded by an absolute address.

Furthermore, in the multi-track PCM audio standard, mode 7 is set in addition to ID _{0 to} ID ₅ for track jump and program search, but this mode can also be used.

In the above case, an example in which the channel number is recorded while watching the reproduced image is shown, but an example in which the manufacturer makes and sells the software will be described with reference to FIG.

As shown in Fig. 6, the image signal of the idol singer's self-introduction (81) and the image signal of the image that matches the music (8
3) etc. are recorded on the head of the magnetic tape (2), and the channel number signal (84), ...
Record (85) (preferably so that it can be displayed.)
Further, an index image signal (82) indicating a song in each channel number signal is also recorded, and a channel number signal (86) indicated by, for example, is recorded so that the song number 1 for each placed song,
2, 3, 4, ... Are added. The portion after (87) shows the multi-PCM audio signal recording portion.

In this state, for example, if you look at the screen of the image video signal (83) and press the freeze shown by, the still image shown by (83) will be displayed, and it will be fast forwarded to the channel position of the channel number, and the channel audio signal will be played. Be seen.

In addition, if the channel and the 4th song are designated by -4 and the index image signal, a still image of, for example, a handmade airplane that matches the image image of the 4th song is displayed and the cue is immediately found at the 4th song position of the channel audio signal. May be performed so that the corresponding piece of music is reproduced, and various modifications are possible.

〔The invention's effect〕

Since the present invention is configured as described above, it is possible to obtain a video and audio signal recording method and a recording apparatus thereof capable of reproducing an audio signal of a channel which matches an image of a still image while watching a still image.

[Brief description of drawings]

FIG. 1 is a track pattern diagram showing an embodiment of a video and audio signal recording method and a recording apparatus thereof according to the present invention, and FIG. 2 is a system showing an embodiment of a video and audio signal recording method and a recording apparatus according to the present invention. FIGS. 3 and 3 are explanatory diagrams of discrimination word data, FIG. 4 is an explanatory diagram of ID mode contents, FIG. 5 is a track pattern diagram showing another embodiment of the present invention, and FIG. 6 is tape recording contents of the present invention. FIG. 7 is an 8 mm video track format diagram, and FIG. 8 is a multi-track PCM audio format diagram. (63) and (69) are pulse processing circuits, (65) are channel number generation circuits, (74) are channel number detection circuits, and (6
6) is a channel selection means.

Claims (2)

(57) [Claims] 1. A video signal and a channel number signal associated with the video signal are recorded on a plurality of tilted tracks on a magnetic tape, and a plurality of tilted tracks different from the plurality of tilted tracks are provided along the longitudinal direction thereof. A video and audio signal recording method in which an audio signal and a channel number signal related to the video signal are respectively recorded in a plurality of channels of the audio signal recording section obtained by dividing the audio signal. 2. A means for recording a video signal and a channel number signal related to the video signal on a plurality of tilted tracks on a magnetic tape, and a plurality of tilted tracks different from the plurality of tilted tracks along the longitudinal direction thereof. A video and audio signal recording apparatus comprising means for recording an audio signal and a channel number signal associated with the video signal in an audio signal recording section of a plurality of channels obtained by dividing the audio signal into a plurality of channels.