JPH08149431A - Video telephone system - Google Patents

Abstract

PURPOSE: To complete a video movie function by carrying out the timing and buffer processing to the image/sound compression data through a minidisk I/F part in response to the recording/reproducing speed of a music minidisk and then using this minidisk as a recording medium. CONSTITUTION: When the image/sound compression data are recorded on a minidisk, these data are inputted to sync bit control circuit 33 from a dividing multiplexing circuit 12 in a transfer rate of communication and written into a FIFO 32 as the compressed image data including an added such bit and the sound data series. Then the data are read out of the FIFO 32 by a keyboard 21 via a data timing control circuit 31 and a converter 30 in response to the transfer request given from a controller 29 and then outputted to an output terminal. In a reproduction mode, an operating instruction is inputted from the keyboard 21 and the data read by the controller 29 are written into the FIFO 32 via the converter 30 and the circuit 31 and then read by the circuit 33 with sync separation. Then the data are expanded and compounded by an image codec 15 and a sound codec 19 and then reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video telephone device for communicating video signals and audio signals on a line.

[0002]

2. Description of the Related Art In recent years, a videophone device has become widespread in which video signals, audio signals, etc. are transmitted and received to communicate using both video and audio.

A conventional videophone device will be described below with reference to the drawings. FIG. 12 is a functional block diagram of a conventional videophone device, and FIG. 13 is a circuit configuration diagram of the conventional videophone device. Reference numeral 1 is a line interface (hereinafter abbreviated as I / F) unit that connects a line and a division multiplexing unit 2 to be described later, and 2 is connected to the line via the line I / F unit 1 and multiplexes or receives data to be transmitted. An image display unit for displaying an image, which is composed of a display, a liquid crystal display device (hereinafter abbreviated as LCD), etc., 4 is an image capturing unit for capturing an image, and 5 is data. An image encoding / decoding unit that encodes or decodes
Reference numeral 6 is a voice input unit for inputting voice, 7 is a voice output unit for outputting voice, 8 is a voice encoding / decoding unit for encoding or decoding voice data, and 9 is a keyboard, a mouse and the like. An operation unit 10 for inputting an operation command by means of a central processing unit (hereinafter abbreviated as CPU), a microprocessor unit (hereinafter abbreviated as MPU), etc. is a control unit for controlling the entire device. In FIG. 13, reference numeral 11 is a line I / F that constitutes the line I / F unit 1 and is connected to the line.
F and 12 are division multiplexing circuits constituting the division multiplexing unit 2,
Reference numeral 13 denotes a camera that constitutes the image capturing unit 4 and captures images.
Is an A / D converter for converting the image data captured by the camera 13 into a digital value, and 15 is an image encoding / decoding unit 5 for encoding the image data converted by the A / D converter 14 or An image codec for decoding the received data divided by the division multiplexing circuit 12, 16 is a D / A converter for converting the image data decoded by the image codec 15 into an analog value, and 17 is an image display unit 3. A display for displaying an image on the basis of the image data converted by the D / A converter 16, a microphone 18 for configuring the voice input unit 6 to input voice, and a reference numeral 19 for the voice encoding / decoding unit 8. A voice codec that configures and encodes the voice data input by the microphone 18 or decodes the received data that is divided by the division multiplexing circuit 12, and 20 configures the voice output unit 7 and forms the voice codec 19 A speaker that outputs the decoded audio data, 21 is a keyboard that constitutes the operation unit 9 and inputs operation commands, 22 is a control circuit that processes the operation commands input by the keyboard 21 and controls the entire apparatus, A data storage circuit 23 stores various data according to a signal from the control circuit 22.

The operation of the conventional videophone device configured as described above will be described below. First, when the recording mode is set by the keyboard 21, the image data from the camera 13 is sent to the image codec 15, and the audio data from the microphone 18 is sent by the audio codec 1.
9 to send. The encoded image data and audio data are compressed and stored in the data storage circuit 23. When the reproduction mode is set, the data read from the data storage circuit 23 is expanded and decoded to display the image data on the display 1.
7, and voice data is output by the microphone 18. Further, with respect to the data transmitted from the other party through the line, the recording / reproduction is similarly performed by setting the recording mode or the reproduction mode with the keyboard 21.

[0005]

However, in the above-mentioned conventional configuration, when a semiconductor memory is used as a recording medium for storing image / sound data, a memory card can be carried but a large capacity is costly. Lack of economy. Also, when using a magnetic disk,
A floppy disk cannot store enough data due to its small capacity, and a hard disk is difficult to carry and lacks portability. There is a problem that it is difficult to enhance the function as a video movie and lacks in functionality.

The present invention solves the above-mentioned conventional problems and has a sufficient capacity as a video movie by using a mini disk for music as a recording medium which has sufficient capacity and high cost performance. Can be made. Further, by providing the switching unit, the function as a video movie can be switched to the function as an audio. Furthermore, by using a mini disk for data as a recording medium, it is possible to speed up data transfer and to dramatically improve the transfer rate. A high-performance, large-capacity and highly functional videophone. The purpose is to provide a device.

[0007]

In order to achieve this object, a video telephone apparatus according to a first aspect of the present invention provides a line interface section connected to a line and data transmitted / received via the line interface section. A division / multiplexing unit that divides / multiplexes, an image display unit that displays an image, an image capturing unit that captures an image, and compression encoding of the image data input by the image capturing unit or the division multiplexing unit An image encoding / decoding unit that expands and decodes the divided received data into image data, a voice input unit that inputs voice, a voice output unit that outputs voice, and the voice data input by the voice input unit. A voice encoding / decoding unit for decompressing the reception data divided by compression encoding or the division multiplexing unit into voice data, an operation unit for inputting an operation command, and an operation input by the operation unit. A videophone device including a control unit for processing instructions and controlling the entire device, wherein compressed video / audio data transmitted / received via the line interface unit is recorded on a music mini disk or for music. A mini disk unit for reproducing the image / audio data from the mini disk, and a processing speed of the mini disk unit connected between the division multiplexing unit and the mini disk unit when recording / reproducing the image / audio data. And a mini disk interface part that performs interface processing,
The videophone device according to claim 2, wherein the videophone device according to claim 1 is connected between the minidisk unit and the minidisk interface unit. The videophone device according to claim 3 has a configuration including a switching unit that performs mode switching between a music mode and a video / audio mode, and the videophone device according to claim 3 is the videophone device according to claim 1. It has a configuration including a transfer request control unit connected between the mini-disc unit and the mini-disc interface unit and transmitting a signal corresponding to the mini-disc for data.

Here, the mini disk interface (hereinafter abbreviated as mini disk I / F) section includes a sync bit control circuit for adding sync bits to the beginning of data for synchronizing the audio and video data, and a temporary data The audio / video data is recorded / reproduced in the mini disk unit by being configured with a FIFO that accumulates dynamically, a serial-parallel conversion circuit that performs serial / parallel conversion of data, and a timing control circuit that takes timing when transmitting / receiving data. In doing so, a speed matching can be achieved. The switching unit includes an input / output terminal for inputting / outputting music data, a converter for analog / digital or digital / analog conversion of music data, and a voice data encoder / decoder for compressing / expanding music data. It is possible to perform input / output to / from the outside by configuring from.

[0009]

With this configuration, the mini disk I / F section
Since the timing processing and the buffer processing corresponding to the recording / reproducing speed of the music mini-disc are performed on the compressed image / audio data, the music mini-disc can be used as a recording medium. Further, since the mode switching unit switches the image / audio mode and the music mode according to the type of data, the recording / reproducing function of the image / audio data can be switched to the recording / reproducing function of the music data. Further, since the transfer request control unit performs signal processing corresponding to the data mini disc, the data mini disc can be used in place of the music mini disc.

[0010]

【Example】

(Embodiment 1) A videophone device according to a first embodiment of the present invention will be described below with reference to the drawings. FIG.
2 is a functional block diagram of a videophone device according to the first embodiment of the present invention, FIG. 2 is a circuit configuration diagram of the videophone device according to the first embodiment of the present invention, and FIG. 3 is a first embodiment of the present invention. FIG. 6 is a diagram showing an example of a configuration of a mini disk unit of the videophone device in the embodiment of FIG.

1 is a line I / F unit, 2 is a division multiplexing unit, 3
Is an image display unit, 4 is an image capturing unit, 5 is an image encoding / decoding unit, 6 is an audio input unit, 7 is an audio output unit, 8 is an audio encoding / decoding unit, 9 is an operating unit, and 10 is a control unit. In FIG. 2, 11 is a line I / F, 12 is a division multiplexing circuit, and 13
Is a camera, 14 is an A / D converter, 15 is an image codec, 16 is a D / A converter, 17 is a display, 18 is a microphone, 19 is a voice codec, 20 is a speaker, 2
Reference numeral 1 is a keyboard, 22 is a control circuit, and 23 is a data storage circuit. Since these are the same as those in the conventional example shown in FIG. Reference numeral 24 is a mini disk unit for recording / reproducing on / from a mini disk, 25 is a mini disk I / F unit for transferring data between the division multiplexing unit 2 and the mini disk unit 24, and 26 is for storing data. A mini disk, 27 is an optical servo controller for driving the mini disk section 24, and 28 is an Eight to Fourteen Mo that performs digital signal conversion and error correction according to the transfer characteristics of the mini disk.
duplication (hereinafter abbreviated as EFM); Cross
Interleave Reed Solomon C
ode (hereinafter abbreviated as CIRC) encoder / decoder, 2
9 is a seismic-resistant memory controller that generates a transfer request, a synchronization pulse, and a transfer clock, 30 is a serial-parallel conversion circuit that performs serial / parallel conversion of data, 31 is a timing control circuit that takes timing when transmitting / receiving data, 32
Is a First that outputs first the input data first.
InFirst Out (hereinafter abbreviated as FIFO), 33
Is a sync bit control circuit for adding sync bits to the beginning of the data in order to synchronize the video and audio data. In FIG. 3, reference numeral 34 is a voice encoder / decoder for compressing and expanding voice data, 35 is a converter for converting a digital signal into an analog signal or an analog signal into a digital signal, 36 is an input / output terminal for inputting / outputting a signal, and 37 is a whole. It is a system controller for controlling.

The operation of the videophone device according to the first embodiment of the present invention configured as described above will be described below. FIG. 4 is a diagram showing a data transfer section of the videophone device according to the first embodiment of the present invention, and FIG. 5 is a packet configuration diagram of the videophone device according to the first embodiment of the present invention. 3 is a flowchart in a sync bit control circuit of the videophone device according to the first embodiment of the present invention. First, in the case of recording the compressed video and audio data on the mini disk, it is inputted from the division multiplexing circuit 12 to the sync bit control circuit 33 at the communication transfer rate,
The compressed image data series and audio data series with sync bits added by the sync bit control circuit 33 are written in the FIFO 32. With the keyboard 21,
Since the seismic resistant memory controller 29 outputs the transfer request, the synchronization pulse and the transfer clock as shown in FIG. 4, the data from the FIFO 32 is read through the timing control circuit 31 and the serial-parallel conversion circuit 30,
It is sent to the data input / output terminal 36 of the earthquake-resistant memory controller 29 shown in FIG. On the other hand, when playing, keyboard 2
1, the operation command is input, and the data read from the earthquake-resistant memory controller 29 in synchronization with the transfer request, the synchronization pulse, and the transfer clock is transferred to the FIFO 3 via the serial-parallel conversion circuit 30 or the timing control circuit 31.
Write to 2. Next, the FIFO 32 may be read while the sync bit control circuit 33 separates the sync so that the transfer rate may be obtained, and the image codec 15 and the audio codec 19 may be expanded and decoded for reproduction.

Interface processing in the mini disk I / F unit 25 will be described with reference to FIG. Communication speed of compressed image / audio data is 128k
If it is bps, it is 300 kb on average in the case of a mini disk.
Since it is ps, speed matching is performed and recording is performed in the packet format shown in FIG. 5 in order to distinguish between audio data and image data. First, at the time of recording, the sync bit control circuit 33 determines whether the half flag is on (S1), and Y
If it is es, the FF character is written (S2). on the other hand,
If No, write sync character (S3), write audio data (S4), write image data (S)
5), write sync characters (S6). Also, at the time of reproduction, the packet data from the mini disk unit 24 is decomposed and transmitted. Further, when recording the image / sound data transmitted from the videophone device of the other party, the image / sound data sequence is written in the FIFO 32 as it is, and the interface processing with the mini disk is performed in the same manner as S1 to S6.

(Second Embodiment) A videophone device according to a second embodiment of the present invention will be described below with reference to the drawings. FIG. 7 is a functional block diagram of a videophone device according to the second embodiment of the present invention, and FIG. 8 is a circuit configuration diagram of the videophone device according to the second embodiment of the present invention. Three
Reference numeral 8 is a switching unit for switching the mode between the image / sound mode and the music mode in response to an operation command input from the keyboard 21, and 39 is a data selector that constitutes the switching unit 38 and selects the type of data.

The operation of the videophone device according to the second embodiment of the present invention constructed as described above will be described below. First, when recording, input / output terminal 36
The signal input from is digitized by the converter 35 and encoded by the audio encoder / decoder 34 in accordance with the Minidisc standard. Next, the encoded signal is selected by the data selector 39 as image / sound data or music data. On the other hand, during reproduction, the signal from the earthquake-resistant memory controller 29 is sent to the data selector 39, and if it is music data, the audio encoder / decoder 34
Decode in accordance with the mini disk standard. The decoded signal is converted into an analog signal by the converter 35 and output from the input / output terminal 36.

Here, for the identification of the mode selection, an identification signal for music or image / sound for each recording item on the mini disk is written in a user track for registering a usual music name and the like, and the identification signal is controlled. It is recognized by the circuit 22 and the data selector 39 is activated.

(Third Embodiment) A videophone device according to a third embodiment of the present invention will be described below with reference to the drawings. FIG. 9 is a functional block diagram of a videophone device according to the third embodiment of the present invention, and FIG. 10 is a third functional block diagram of the present invention.
FIG. 3 is a circuit configuration diagram of a videophone device in the example of FIG.
Reference numeral 40 is a transfer request control unit that sends out a transfer request, a transfer clock, and a synchronization pulse corresponding to the data minidisk, and 41 is a transfer request control circuit that constitutes the transfer request control unit 40.

The operation of the videophone device according to the third embodiment of the present invention constructed as above will be described below. FIG. 11 is a diagram showing a data transfer section of the videophone device according to the third embodiment of the present invention. Here, the transfer request control unit 40 continuously generates a transfer clock, a transfer request, and a synchronization pulse corresponding to the data mini-disc as shown in FIG. 11 at intervals of a data transfer period of 11.6 msec. First, at the time of recording, data is read out to the FIFO 32 via the timing control circuit 31 or the serial-parallel conversion circuit 30 according to various signals from the transfer request control unit 40, and sent to an input / output terminal (not shown) of the seismic resistant memory controller 29. To do. During reproduction, data is read from the earthquake-proof memory controller 29 according to various signals from the transfer request control circuit 41, so the serial-parallel conversion circuit 30 and the timing control circuit 31 are read.
To the FIFO 32 via.

Here, the data transfer processing of the data mini disk will be described with reference to FIG. In the data mini disk, one section of data transfer is 11.6ms
In ec, data transfer processing of 2352 bytes is performed.
As a result, the transfer amount of 424 bytes in the data transfer section of the music mini disk can be processed with 2352 bytes with the data mini disk, and the data transfer rate of the music mini disk is 300 kbps. With a mini disc, processing can be performed at a transfer rate of 1200 kbps.

[0020]

As described above, the present invention is based on the mini disk I.
The / F section performs timing and buffer processing on the compressed image and sound data in accordance with the recording / playback speed of the music mini disc, so that the music mini disc can be used as a recording medium and functions as a video movie. It is possible to realize a videophone device that is enhanced.
Also, since the mode switching unit switches between the image / audio mode and the music mode according to the type of image data,
The recording / reproducing function of the image / sound data can be switched to the recording / reproducing function of the music data, and a multifunctional videophone device having an audio function can be realized. Further, since the transfer request control unit performs signal processing corresponding to the data mini-disc, the data mini-disc can be used instead of the music mini-disc, and by increasing the data amount of one section at the time of data transfer. Thus, it is possible to realize a high-performance videophone device capable of speeding up data transfer and improving the transfer rate.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a videophone device according to a first embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of the videophone device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an example of a configuration of a mini disk unit of the videophone device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a data transfer section of the videophone device according to the first embodiment of the present invention.

FIG. 5 is a packet configuration diagram of the videophone device according to the first embodiment of the present invention.

FIG. 6 is a flowchart of a sync bit control circuit of the videophone device according to the first embodiment of the present invention.

FIG. 7 is a functional block diagram of a videophone device according to a second embodiment of the present invention.

FIG. 8 is a circuit configuration diagram of a videophone device according to a second embodiment of the present invention.

FIG. 9 is a functional block diagram of a videophone device according to a third embodiment of the present invention.

FIG. 10 is a circuit configuration diagram of a videophone device according to a third embodiment of the present invention.

FIG. 11 is a diagram showing a data transfer section of the videophone device according to the third embodiment of the present invention.

FIG. 12 is a functional block diagram of a conventional videophone device.

FIG. 13 is a circuit configuration diagram of a conventional videophone device.

[Explanation of symbols]

 1 line I / F unit 2 division multiplexing unit 3 image display unit 4 image capturing unit 5 image encoding / decoding unit 6 audio input unit 7 audio output unit 8 audio encoding / decoding unit 9 operation unit 10 control unit 11 line I / F 12 division multiplexing circuit 13 camera 14 A / D converter 15 image codec 16 D / A converter 17 display 18 microphone 19 voice codec 20 speaker 21 keyboard 22 control circuit 23 data storage circuit 24 minidisk section 25 minidisk I / F section 26 Mini disk 27 Optical servo controller 28 EFM / CIRC encoder / decoder 29 Seismic memory controller 30 Silipara conversion circuit 31 Timing control circuit 32 FIFO 33 Sync bit control circuit 34 Audio encoder / decoder 35 Converter 36 Input / output terminal 37 the system controller 38 switching unit 39 data selector 40 transfer request controller 41 transfer request control circuit

Claims (3)

[Claims] 1. A line interface unit connected to a line, a division multiplexing unit for dividing / multiplexing data transmitted / received via the line interface unit, an image display unit for displaying an image, and an image for capturing an image. An image pickup unit, an image encoding / decoding unit for compression encoding the image data input by the image capturing unit or decompressing the received data divided by the division multiplexing unit into image data, and inputting voice. A voice input unit, a voice output unit that outputs voice, and a voice code that compresses and encodes the voice data input by the voice input unit or expands and decodes the received data divided by the division multiplexing unit into voice data. A videophone device comprising: a decryption unit, an operation unit for inputting an operation command, and a control unit for processing the operation command input by the operation unit to control the entire apparatus. A mini disk unit for recording compressed image / audio data transmitted / received via an interface unit on a music mini disc or reproducing the image / audio data from the music mini disc, the division multiplexing unit and the mini disc unit. And a mini disk interface unit which is connected between the two and performs interface processing corresponding to the processing speed of the mini disk unit when recording and reproducing the image and sound data. 2. A switching unit, which is connected between the mini-disc unit and the mini-disc interface unit, for performing mode switching between a music mode and a video / audio mode. The videophone device according to. 3. A transfer request control unit, which is connected between the mini disk unit and the mini disk interface unit and sends out a signal corresponding to a data mini disk, according to claim 1. The videophone device described.