JP2599364B2 - Image / audio information playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses, for example, a cassette type magnetic recording / reproducing apparatus for an automobile (hereinafter referred to as an audio cassette deck) to reproduce image information and audio information recorded on a cassette. -It relates to an audio information reproducing device. For example, when the apparatus of the present invention is used as an image / sound information reproducing apparatus for an automobile, information on equipment of the vehicle, information on a highway, etc. is displayed as an image on a cathode ray tube installed in the cabin, and Anaus is also used as a sound. it can.

2. Description of the Related Art Conventionally, there has been an apparatus that reproduces only road guidance and a description of vehicle equipment by using only an audio cassette deck. In addition, a video tape recorder or the like is conventionally known as a device for reproducing image information and audio information.

Problems to be Solved by the Invention However, as described above, in the conventional apparatus for performing road guidance or the like using the audio cassette deck, since information is transmitted only by voice, the information transmission is insufficient or the information is not transmitted. There was a problem that transmission took time. Further, in the conventional video tape recorder, image information and audio information are transmitted, so that there is an advantage that the information can be sufficiently transmitted, but there is a problem that the apparatus is complicated and expensive.

The present invention is to eliminate the problems of the above conventional example,
An image / audio information reproducing apparatus that reproduces image information and audio information using a cassette deck for audio reproduction is provided.

Means for Solving the Problems The present invention solves the above-mentioned conventional problems, and includes a silence detecting section for detecting a silence section of an audio cassette tape and a deck control for switching a mode of a deck section in accordance with the silence detection. And an audio cassette deck for reproducing an audio cassette tape having outer and inner channels on the A and B tracks, respectively, in the A and B directions, and an outer cassette on the A and B tracks, respectively. Each file consists of a plurality of files separated by silence sections provided over both inner channels. Each file has image information recorded only on the outer channel of the track and the inner channel is silenced, and both the outer and inner tracks of the track. And a portion where audio information is recorded in the channel. An audio / video cassette tape in which a silent section is located at a position opposite to a portion of the other track on which image information is recorded, and an image detected when the audio / video cassette tape is reproduced on the audio cassette deck. It comprises an image display device for displaying an image based on data.

Therefore, according to the present invention, the reproduction of the audio cassette tape and the RO as the audio / video cassette tape can be performed.
The reproduction of the image information and the reproduction of the audio information recorded on the M cassette tape can be performed by the audio cassette deck.

1. Embodiment In FIG. 1, reference numeral 1 denotes a deck unit. The deck unit 1 has a motor for driving a reel in a cassette, a traveling direction switching mechanism for switching a traveling direction, and a fast forward (FF).
Or, it includes an FF / REW mechanism for performing rewinding (REW), an eject mechanism for discharging a cassette, and the like. 2
Is a deck control unit for controlling the deck unit 1. The deck control unit 2 includes a central processing unit (CPU) RAM, R
It is composed of OM etc. Reference numeral 3 denotes an operation unit. The operation unit 3 includes a keyboard and the like. By pressing the operation button of the operation unit 3, a control signal is output from the deck control unit 2 to the deck unit 1, and fast forward (FF), rewind (REW), stop,
Music selection, A / B switching, and ejection are performed. 4A, 4B, 4
C and 4D are magnetic heads, and these four magnetic heads 4A to 4D correspond to the A-side outside channel, the A-side inside channel, the B-side inside channel, and the B-side outside channel of the magnetic tape in the cassette. 5 is the A side output from the deck control unit 2
A switching circuit that is switched by the / B surface switching signal, 6A and 6B are preamplifiers that amplify the signals detected by the magnetic heads 4A to 4D, 7A and 7B are main amplifiers, 8A and 8B are speakers, and 9 is no recording between tracks. The number of non-recorded points detected by the silence detecting section 9 in the music selection mode is calculated by the deck control section 2 and is compared with a numerical value specified in advance. Perform playback. Reference numeral 10 denotes a mute control unit. The mute control unit 10 controls the main amplifiers 7A and 7B so that no reproduced sound is output from the speakers 8A and 8B in the music selection mode, for example.

With the above configuration, a normal audio cassette deck 11 is configured.

This embodiment uses the audio cassette deck 11 and adds circuits and the like to the audio cassette deck to reproduce image information and audio information recorded on a video / audio cassette (ROM cassette). Next, a circuit and the like added to the audio cassette deck will be described.

In FIG. 1, 12 is a data reading circuit for reading data from the output of the preamplifier 6A, 13 is a data transfer circuit for transferring the read data, and 14 is for storing the transferred data and sequentially reading the stored data. And a CRT control circuit for outputting to the cathode ray tube (CRT) display device 15. The operation unit 3 is provided with an operation button 16 for designating a ROM cassette mode. When the operation button 16 is operated, a mute control signal is supplied from the deck control unit 2 to the mute control circuit 10, so that no sound is reproduced from the speakers 8A and 8B.

FIG. 2 shows a format of a ROM cassette in which image information and audio information are recorded on a magnetic tape in the cassette. As with the audio cassette, the number of channels is two for the A-side track and two for the B-side track, for a total of four channels. Both the A-side track and the B-side track are recorded in the same form.
Each surface track has a plurality of files, and one file includes a silent section, an image information section, and an audio information section,
In addition, each file is configured such that the silent section of one of the tracks on the A and B tracks is arranged at a position facing the image information section of the other track. The silent section is provided over both the outer and inner channels on both the A and B tracks. In the image information section,
Image information is recorded only on the outer channel for both the A-side and B-side tracks, and the inner side channel is in a silent state. In the audio information section, audio information is recorded on both the outer and inner channels on both the A and B tracks. Image information consists of an address data part (D1), an image data part (D2),
It consists of a voice control section (D3). The file number and the number of recorded files for each track are recorded in the address data section (D1), the image data to be displayed on the CRT 15 is recorded in the image data (D2), and the mute is released in the audio control section (D3) Signal is recorded. Arrows A and B in FIG. 2 indicate the running directions of the magnetic tape during A-side reproduction and B-side reproduction, respectively.

Next, the operation of this embodiment will be described. First, the above ROM
The cassette is set on the deck unit 1 and the operation button 16 for specifying the ROM cassette mode of the operation unit 3 is pressed. When the operation button 16 is pressed, a control signal is output from the deck control unit 2 to the mute control unit 10, and the mute state is set. When the operation mode 16 is pressed to enter the ROM cassette mode, the deck controller 2
Causes the deck unit 1 to perform a rewind (REW) operation. During this rewind (REW) operation, the silence detecting section 9
When the first silent section is detected in the above, the deck section 1 is switched to a reproducing operation by a signal from the deck control section 2. When the reproducing operation is started, the data (file number and number of recorded files) of the address data section (D1) picked up by the magnetic head 4A or 4D is read by the data reading circuit 12, and the file number and the number of recorded files are read from the deck. It is sent to the control unit 2. Here, the deck unit 1 is in a stopped state. Next, a required file number is input from the keyboard of the operation unit 3. The input file number is stored in the deck control unit 2. The deck controller 2 calculates (calculates) the number of silent sections between the current file number and the required file from the specified file number and the current file number sent from the data reading circuit 12, and The deck unit 1 is switched to a fast forward (FF) or rewind (REW) operation. During the FF or REW operation, the number of silence sections detected by the silence detection section 9 is counted by the deck control section 2 and compared with the calculated value. When the count value of the silent section matches the calculated value, the deck section 1 is switched to the reproducing operation, and the image data (D2) of the required file is output to the data transfer circuit 13 read by the data reading circuit 12. The data transfer circuit 13 transfers the reproduced image data (D2) to the CRT control circuit 14. The CRT control circuit 14 stores the transferred image data (D2) and sequentially reads out the stored data to output to the CRT 15. The CRT 15 displays a predetermined image based on the transmitted data. When the voice control data (D3) is picked up by the magnetic head 4A or 4D, the data reading circuit 12
A signal for canceling mute is sent to the deck control unit 2 and the mute cancellation command is issued from the deck control unit 2 to the mute control unit 10 to cancel the mute. Subsequently, audio information (AU1, AU2) is picked up by the magnetic heads 4A, 4B or 4C, 4D, amplified by the preamplifiers 6A, 6B and the main amplifiers 7A, 7B, and output from the speakers 8A, 8B. When the reproduction of the audio information ends, a silent section is detected, and the deck unit 1 is switched to a stopped state.

As described above, in the present embodiment, the ROM cassette can be reproduced by the audio cassette deck, and the entire apparatus is inexpensive. Further, according to the present embodiment, since the image information is recorded only on the outer channel, the magnetic tape is displaced in a direction perpendicular to the running direction during the FF, REW operation of the ROM cassette for file search. In this case, the image information of the adjacent channel is not picked up at the time of detecting the silent section, and no malfunction occurs.

Effects of the Invention According to the present invention, the following effects can be obtained.

(1) By using the mechanism and circuit of the audio cassette deck, it becomes possible to reproduce the image information and audio information of the ROM cassette.

(2) Since the mechanism and circuit of the audio cassette deck are used, the combination device of the audio cassette deck and the ROM cassette deck is inexpensive.

(3) Since image information is recorded only on the outer channel of the ROM cassette, it is possible to prevent a signal from an adjacent channel from being picked up and malfunctioning, particularly when no sound is detected in the FF and REW operations.

(4) The file search of the ROM cassette can be performed by using the silence detecting section of the audio cassette deck.

[Brief description of the drawings]

FIG. 1 is a block diagram of an image / audio information reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a view showing a format of a ROM cassette used in the apparatus. 1 ... deck unit, 2 ... deck control unit, 3 ... operation unit,
4A, 4D: Magnetic head, 5: Switching circuit, 6A, 6B: Preamplifier, 7A, 7B: Main amplifier, 8A, 8B: Speaker,
9: Silence detection unit, 10: Mute control unit, 11: Audio cassette deck, 12: Data reading unit, 13:
Data transfer circuit, 14 CRT control circuit, 15 CRT display device, 16 operation buttons.

Continued on the front page (72) Inventor Takeshi Torii 1 Toyota Town, Toyota City Toyota Motor Corporation (72) Inventor Yoshiro Okamoto 1 Toyota Town Toyota City In Toyota Motor Corporation (72) Inventor Hiroshi Matsuzaki 1 Toyota Town, Toyota City Toyota Motor Corporation (72) Inventor Hiroshi Shiya 1 Toyota Town Toyota City, Toyota Motor Corporation (56) References JP-A-60-150280 (JP, A)

Claims (1)

(57) [Claims] 1. An audio cassette tape comprising: a silence detecting section for detecting a silence section of an audio cassette tape; and a deck control section for switching a mode of a deck section in response to the silence detection. An audio cassette deck for reproducing an audio cassette tape provided with A in the direction of the A and B planes, and a plurality of files separated by silent sections provided on both the outer and inner channels on the A and B tracks respectively Each file is composed of a portion where image information is recorded only on the outer channel of the track and the inner channel is silenced, and a portion where audio information is recorded on both the outer and inner channels of the track. In the surface track, the silent section of one track faces the portion of the other track where the image information is recorded. The arrangement image audio cassette tape location, becomes the image and audio cassette tape and an image display device that displays an image based on the image data detected upon playback in the audio cassette deck,
An image / audio information reproducing apparatus, wherein a file search is performed using silent section information detected at the time of reproducing the audio / video cassette tape.