JPH02279081A - Audio picture recorder - Google Patents

Abstract

PURPOSE:To record excellent audio and picture signal by switching the connection of a telephone line, recording audio information on an audio tape, recording picture information in a picture memory separately and recording an address signal corresponding to the picture onto the audio tape so as to synchronize the tape with the audio signal. CONSTITUTION:The information received by a central control section 17 through a telephone line 1 is discriminated as to whether it is audio information or video information and a changeover section 15 switches the connection of the telephone line 1 and the picture information is sent to a picture memory section 7, in which the information is recorded and an address signal identifying the picture corresponding to the audio information is recorded by an audio recording section 16. Then a series of operation reproducing them is controlled by the central control section 17. Thus, mutual effect between the audio information and the video information is avoided and the invasion of the modulation sound of the picture information into the audio information or the deterioration in the reproduced picture quality due to elongation of the audio tape and the uneven turning of a cassette recorder is less, and excellent audio and picture are recorded and reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio image recording device, and more particularly to an audio image recording device that records audio information and image information transmitted via a telephone line.

[Prior art] There is a demand for videophones that simultaneously transmit audio and images using telephone communication lines, but in reality, current telephone communication lines cannot continuously transmit dynamic images that require a huge amount of data. Since it is difficult to send and receive digitally, still image videophones that transmit still images to the other party during a call are being put into practical use.

Conventionally, the following methods have been used to record the contents of communications conducted using still image videophones and the like.

FIG. 4 is a block diagram showing the image communication section of a conventional videophone, which is shown on page 31 of "Details of TTC Standard Videophone," September 1988 issue of TV Technology. In the figure, (1) is a telephone line, (2) is a network control unit that controls the input/output of image information to and from the line and input/output of a cassette recorder, etc., and (3) is a unit that modulates and demodulates image information based on the TTC standard. The modulation/demodulation section (4) is a phase-locked loop (hereinafter referred to as
(abbreviated as PLL)), (5) is a central control unit that controls the entire system, and (6) is the central control unit (5).
an image processing unit (7) that controls image information according to instructions from
) is an image memory unit that stores images, (8) is a monitor that displays images, (9) is a tape recording side terminal, (10) is a tape playback/telephone selector switch, (11) is a tape playback terminal, (12) ) is the cassette recorder, (13) is the line input (LINE-IN) terminal, and (14) is the line output (LI
NE-OUT) terminal.

Note that the TTC standard mentioned above is a standard for "analog telephone band still image video system."

Next, the operation will be explained. When recording the received audio information and image information, use a cassette recorder or the like to connect the tape recording terminal (9) shown in Figure 4 to the LINE-IN terminal (13) of the cassette recorder (12). death,
Put the cassette recorder (12) into recording mode. The audio information and modulated image information sent via the telephone line (1) are sent to the cassette recorder (12) via the network control unit (2).
) and recorded.

To play, press the tape playback/telephone selector switch (10
) to the tape playback side, and connect the tape playback terminal (11) and the LINE -0UT terminal (1) of the cassette recorder (12).
4) and put the cassette recorder (12) into playback mode. The audio information and modulated image information are played back by a tape recorder (12), and if there is image information, it is demodulated by synchronous detection in a modulation/demodulation section (3) and a demodulation timing generation section (4), and then sent to a central control section (5). The image processing unit (6
) is written to the image memory section (7) and displayed on the monitor (
8).

[Problems to be Solved by the Invention] A conventional audio image recording device for a videophone or the like is configured as described above. Therefore, image information is also recorded along with audio information on an audio tape on which audio is recorded. For this reason, when image information is played back, the PLL, which recovers the carrier wave by phase synchronizing the playback signal, becomes unable to follow the image information due to stretching of the audio tape or uneven rotation of the cassette recorder, etc., resulting in synchronous detection. There were problems in that the timing was off and the image quality often deteriorated.

Furthermore, since the image information is modulated and recorded on the audio tape, there is a problem in that when it is played back, it can be heard as a modulated sound of the image information.

This invention was made with the aim of solving the above-mentioned problems, and it is possible to record images with little deterioration in image quality and good audio without modulation of image information included in the audio information. The purpose of the present invention is to provide a sound and image recording device that is easy to use.

[Means for Solving the Problems] An audio image recording device according to the present invention is a device that transmits and receives audio information and modulated image information via a telephone line. The switching section determines whether it is information or image information, and sends the audio information to the audio recording section and the image information to the image memory section.The image memory section temporarily records the image information, and then sends the image information to the audio recording information section. The present invention is characterized in that audio information and an address signal for identifying specific image information corresponding thereto are recorded, and recording and reproduction are performed while controlling these through a central control unit.

[Operation] In the audio image recording device according to the present invention, the central control unit determines whether the information received through the telephone line is audio information or image information, and the switching unit switches the connection of the telephone line, and the image information is The audio information is sent to the image memory section for recording, the audio recording section records the address signal that identifies the audio information and the corresponding image, and the central control section controls a series of operations to reproduce the audio information. and image information will not influence each other (and
It has become possible to record and reproduce good audio and images with less deterioration in playback quality due to modulated sound of image information being included in audio information, stretching of audio tapes, and uneven rotation of cassette recorders.

[Example] Next, a preferred example of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing an audio image recording means in an embodiment of the present invention. Here, the same members in the conventional example shown in FIG. 4 are designated by the same reference numerals, and redundant explanation will be omitted.

This embodiment includes a switching unit (15) that switches between audio information and image information in the received signal from the telephone line (1), and uses a cassette recorder as the audio recording unit (16) that records audio information etc. A semiconductor memory is used for the image memory section (7) that records images in correspondence with audio information. Also, an FSK modulation/demodulation section (18) modulates and demodulates the address of the image memory section (7) to the audio recording section (16) using frequency shift keying (hereinafter abbreviated as FSK), and converts the captured image into an electrical signal and outputs it. Camera (19)
It is characterized in that each block is controlled by a central control section (17).

Next, the operation of the audio image recording apparatus of this embodiment based on the above configuration will be explained in the first step according to the flowchart shown in FIG.
This will be explained using the diagram and FIG.

When information is received from the telephone line (1), the central control unit (1)
7) operates according to the flow chart shown in FIG. The judgment as to whether the information received in step 100 in FIG. 2 is audio information or image information is made by the TT shown in FIG.
Based on the C standard. That is, the determination is made based on whether or not the header section (21) containing the mutual capability identification ID (information data) for mutually confirming the image mode/size, reception capability, etc. has been received. The above header section (21)
In step 101 of FIG. 2, until receiving the
The switching unit (15) shown in FIG. 1 is on the side of the audio recording unit (16) of the cassette tape recorder, and records audio information on an audio tape in step 102.

When the header section (21) in FIG. 3 is received, the switching section (15) switches to the network control section (2) side opposite to that in FIG. 1 in step 103 in FIG. Image information corresponding to the image mode indicated by the ID of is recorded in the image memory section (7), and following the audio information (including the header section (21)) that has been recorded so far, the memory address of the received image is recorded. is modulated by the FSK modulator/demodulator (18), recorded on the audio tape as the address signal (2o) in FIG. 3, and recording on the cassette recorder is stopped.

In step 105 in FIG. 2, the header section (21
), it is detected that the recording of the image information shown in FIG. 1 to the image memory unit (7) has ended, and recording to the tape recorder is resumed.

In step 106, it is determined by the user's operation whether recording of the audio information and image information has been completed, and if the recording has been completed, the process proceeds to the next routine, and if not, the process returns to step 100 and the above-described operations are repeated.

To reproduce the audio information, by setting the cassette recorder of the audio recording section (16) shown in FIG. 1 to the reproduction side, audio information without any modulation sound or the like is reproduced. Central control unit (17
), when the address signal (2o) written at the end of the audio information is reproduced, the FSK modulator (18) demodulates the address signal (20) and outputs the image information corresponding to the demodulated address. It can be recalled from the image memory section (7) and displayed on the monitor (8).

In this way, the audio image recording device of this embodiment separates the audio information and image information from the received signal by switching the telephone line, records each piece of information in the cassette recorder and the image memory part, and records the mutual information. In order to accommodate this and facilitate playback, an address signal was recorded on the tape side. As a result, the deterioration of playback image quality due to uneven rotation and stretching of the audio tape, which was a problem in the past, has been eliminated, and it has become possible to obtain good audio without modulating the image information on the audio information side. A suitable audio/video recording device capable of immediately reproducing corresponding images has been created.

In addition, in the above embodiment, the recording and reproduction of image information and audio information from the telephone line was explained, but it is also possible to apply this to the recording of an answering message for an answering machine, etc., to send to the other party. If the images from the camera (19) shown in the figure are recorded in the image memory section (7) and the audio is recorded in the cassette recorder section (16), and the audio and images are transmitted separately, the image quality will be less degraded. It is possible to send clear audio.

[Effects of the Invention] As described above, according to the audio image recording device of the present invention,
The telephone line connection was switched, voice information was recorded on audio tape, image information was recorded separately in image memory, and address signals corresponding to the images were recorded on the audio tape so that they could be synchronized with the voice. This prevents deterioration in image quality caused by recording audio and image information on a cassette recorder as in the conventional case, and eliminates the audible modulated sound when image information is modulated and recorded on an audio tape, resulting in better audio quality. and images can be recorded.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an audio image recording means in an embodiment of the present invention, FIG. 2 is a flowchart for recording audio information and image information, and FIG. 3 is an audio tape and image memory for received signals. FIG. 4 is a block diagram showing the image communication section of a conventional videophone. In the figure, (1) is a telephone line, (7) is an image memory section, (15) is a switching section, and (17) is a central control section. In addition, the same symbols or corresponding parts are shown in the figures. Agent: Patent Attorney Masuo Oiwa (2 others) Voice Suizensho and JHF Dormitory 44 Face 0 Ji Fengtoku's 70-Chart 2 Figure

Claims (1)

[Claims] An audio-image recording device that transmits and receives audio information and modulated image information via a telephone line, comprising: an image memory unit that temporarily stores the image information; and a specific image information along with the audio information. an audio recording unit that records an address signal corresponding to the audio information; and a switching unit that switches the received signal between audio information and image information and sends the received signal to the image memory unit and the audio recording unit; An audio and image recording device that processes information and image information and performs recording and reproduction.