JPH05119788A - Transmitter-receiver - Google Patents

Abstract

PURPOSE:To send respective digital data digitally transmitting without affecting with the quality of a transmission cable, and to accurately reproduce the respective transmitted data even if they are affected by a jump noise, etc., by performing an EFM decoding process by EFM decoder and also performing an error correcting process, a de-interleaving process, etc. CONSTITUTION:A transmission part 1 imposes 2PSK modulation upon speech data, image data, and time data after an EFM encoding process, which are reproduced from a CD-I 2, by an RF modulating circuit 5 and digitally sends the data to a reception part 15 through the transmission cable. The reception part 15 imposes 2PSK demodulation on the speech data, image, and time data, which are digitally sent after the 2PSK modulation, by an RF demodulating circuit 21 and the EFM decoder 22 performs the EFM decoding process, error correcting process, and de-interleaving process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a so-called karaoke device and a multilink system for distributing audio and video information from one place to each room in a home by wire to selectively view information. The present invention relates to a transmission / reception device suitable for use.

[0002]

2. Description of the Related Art Today, so-called karaoke devices have been remarkably popular. Although the karaoke device seems to use a magnetic tape as a recording medium in the early days, it is an optical disc in which audio signals are digitized and recorded because of durability and high-speed access. So-called CDs have come to be used.

The above CD has 14 bits of 8-bit audio data.
Bits are encoded and processed (EFM encoding) and recorded. However, since only the audio data is recorded in the above CD, when actually singing a song to accompaniment,
For example, it is very inconvenient to hold a bookletized lyrics book in one hand and sing while watching the lyrics book.

For this reason, at present, so-called CD-I can record not only audio data but also image data.
(CD-Interactive) has come to be widely used. The CD-I is a natural image as the image data,
Animation, computer graphics,
The lyrics (character data) of the song and the like are recorded by performing the EFM encoding process together with the voice data. Therefore, it is possible to eliminate the trouble of holding a lyrics book in one hand like the above CD, and the user can sing a song while watching the lyrics displayed on the monitor device or the like.

In such a karaoke apparatus using the above CD-I, it is preferable that the area around the place where the song is sung is not busy, and therefore, the above audio data and image data recorded on the above CD-I are recorded. Are separated into a transmitting unit for reproducing and transmitting the data and a receiving unit for receiving the audio data and the image data transmitted from the transmitting unit.

FIG. 3 shows a transmitting section of a transmitting / receiving apparatus which is a conventional karaoke apparatus, and FIG. 4 shows a receiving section thereof. First, in FIG. 3, in the transmitting unit 51, the CD-I in which the audio data and the image data of the designated song are recorded.
53 to a constant linear velocity (CL
V) or rotationally driven at a constant angular velocity (CAV),
The audio data and the image data recorded on the D-I 53 are read by the optical system 55 and supplied to the EFM decoder 56.

The audio data and the image data recorded on the CD-I 53 are respectively E-coded as described above.
Since the FM encoding processing has been performed, the EFM decoder 5 described above is used.
6 is an EFM for each of the above audio data and image data.
After the decoding processing, the audio data is supplied to the D / A converter 57, and the image data is supplied to the graphic decoder 58.

The D / A (digital / analog) converter 57 converts the EFM-decoded audio data into an analog signal and supplies it to the RF modulation circuit 61 and the output terminal 59 as an audio signal. The graphic decoder 5
Reference numeral 8 applies predetermined image data processing to the EFM-decoded image data to make it analog, and supplies this to the RF modulation circuit 61 and the output terminal 60 as an image signal.

The RF modulation circuit 61 applies so-called FM modulation to the audio signal and so-called AM to the image signal.
Modulation is performed, and these are output through the output terminal 69.
The FM-modulated audio signal and the AM-modulated image signal output from the output terminal 69 are supplied to the receiving unit 52 shown in FIG. 4 via a transmission cable.

The output terminals 59 and 60 are spare terminals and are connected to, for example, a speaker device, a monitor device, etc. provided on the side of the transmitter 51.

Next, in FIG. 4, the audio signal and the image signal, which are so-called analog transmitted from the transmitting section 51 shown in FIG. 3, are supplied to the RF demodulation circuit 62 through the input terminal 70, respectively. The RF demodulation circuit 62 FM demodulates the audio signal and supplies it to the adder 64, and AM demodulates the image signal and supplies it to the monitor device 68.

To the adder 64, in addition to the FM-demodulated voice signal, a voice signal corresponding to, for example, the singing voice of the user is supplied from the microphone device 63. The adder 64 performs addition processing on the FM demodulated audio signal and the audio signal from the microphone device 63, and supplies this to the speaker device 67 via the amplifier 66. The level of the added audio signal from the adder 64 can be adjusted by the volume 65.

As a result, the lyrics and images corresponding to the arbitrarily designated song are displayed on the monitor device, and the accompaniment of the arbitrarily designated song and the singing voice of the user are sounded from the speaker device 67.

[0014]

However, in the above-mentioned conventional transmitting / receiving apparatus, the audio data and the image data reproduced from the CD-I 53 in the transmitting unit 51 are respectively converted into analog data, and the receiving unit is transmitted via the transmission cable. Since it is transmitted to 52, it is likely to be adversely affected by jump-in noise or the like. Further, the quality of the transmission cable is apt to be affected, and it is impossible to accurately reproduce both the audio data and the image data.

The present invention has been made in view of the above-mentioned problems, is not easily adversely affected by dive noise, and is not affected by the quality of the transmission cable. It is an object of the present invention to provide a transmission / reception device that can reproduce accurately.

[0016]

A transmitting / receiving apparatus according to the present invention is an optical disk reproducing means for reproducing encoded audio data, image data and time data recorded on an optical disk, and reproducing by the optical disk reproducing means. A transmission unit for performing a predetermined modulation on each of the above-described data and transmitting the data to a transmission system; and a demodulation unit for demodulating the audio data, the image data, and the time data transmitted from the transmission unit via the transmission system, Audio data decoding means for performing decoding processing on the audio data demodulated by the demodulation means, image data decoding means for performing decoding processing on the image data demodulated by the demodulation means, and decoding by the audio data decoding means The output audio data and the image data decoded by the image data decoding means are output simultaneously based on the time data. It is composed from the receiving section and a control means for solving the above problems as characterized.

[0017]

In the transmitting / receiving device according to the present invention, in the transmitting section,
The optical disk reproducing means reproduces the encoded audio data, image data and time data recorded on the optical disk, performs a predetermined modulation on each of the data, and sends the data to the transmission system. The audio data, the image data, and the time data transmitted through the transmission system are demodulated, the audio data decoding means performs a decoding process on the audio data demodulated by the demodulation means, and the image data decoding means performs the demodulation. Decoding processing is performed on the image data demodulated by the means, and the output control means outputs the audio data decoded by the audio data decoding means and the image data decoded by the image data decoding means based on the time data. Output simultaneously.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a transmitting / receiving apparatus according to the present invention will be described below with reference to the drawings. The transmission / reception apparatus according to the present embodiment is configured by connecting, for example, the transmission unit 1 shown in FIG. 1 and the reception unit 15 shown in FIG. 2 provided at a place apart from the transmission unit 1 with a transmission cable.

The transmitting unit 1 is a CD-recorded by EFM-encoding audio data, image data and time data.
A spindle motor 3 for rotating I2, and the CD-
The optical system 4 which is an optical disk reproducing means for reading the audio data and the image data which are EFM-encoded and recorded in I2 and the recorded audio data and the time data corresponding to the image data, and the optical system 4 An RF modulation circuit 5 that performs predetermined modulation on the read audio data, image data, and time data, and an EFM decoder 6 that performs EFM decoding processing on the audio data, image data, and time data read by the optical system 4. , D / A the audio data subjected to the EFM decoding processing by the EFM decoder 6
It comprises a D / A converter 7 for (digital / analog) conversion and a graphic decoder 8 for analogizing the image data subjected to EFM decoding processing by the EFM decoder 6.

The receiving section 15 applies R to the audio data, the image data and the time data which have been subjected to predetermined RF modulation from the transmitting section 1 and digitally transmitted via a transmission cable.
An RF demodulation circuit 21 which is a demodulation means for performing F demodulation, and an EFM decoder 22 which is an audio data decoding means for performing EFM decoding processing on the audio data, the image data and the time data demodulated by the RF demodulation circuit 21. , Above E
D for D / A converting the audio data from the FM decoder 22
A / A converter 23, an adder 24 that adds and processes the audio signal from the D / A converter 23 and the audio signal from the microphone device 25, and outputs the level of the audio signal from the adder 24. A volume 26 to be adjusted, an amplifier 27 that amplifies and outputs a sound signal supplied through the volume 26 with a predetermined gain, and a speaker 28 that sounds according to the sound signal supplied through the amplifier 27. have.

Further, the receiving section 15 performs graphic processing on the image data supplied from the EFM decoder 22 to form an image signal and outputs the image signal as a graphic decoder 29, and the EFM. The time difference between the audio data and the image data is detected from the time data supplied from the decoder 22, and the D / A converter 23 is detected according to the detected time difference between the audio data and the image data. And a time decoder 31 which is an output control means for controlling the audio signal and the image signal to be simultaneously output from the graphic decoder 19.

Next, the operation of the transmitting / receiving apparatus according to this embodiment will be described. First, in FIG. 1, in the transmission unit 1, the CD-I 2 is rotationally driven by the spindle motor 3 at a constant linear velocity (CLV) or a constant angular velocity (CAV), and the CD-I 2 is EFM-encoded. The recorded audio data, image data and time data corresponding to the audio data and the image data are read by the optical system 4, and are supplied to the RF modulation circuit 5 and the EFM decoder 6, respectively.

The EFM decoder 6 EFM-decodes the audio data, the image data and the time data, respectively, and the EFM-decoded audio data is sent to the D / A converter 7 and the EFM decoding process. The generated image data is supplied to the graphic decoder 8. Above D /
The A converter 7 converts the audio data into an analog signal and supplies it to the output terminal 9 as an audio signal.

Further, the graphic decoder 8 performs predetermined image processing on the image data to form an image signal, and supplies the image signal to the output terminal 10. The output terminals 9 and 10 are spare terminals, and are connected to, for example, a speaker device, a monitor device, or the like provided on the transmitter 1 side. As a result, in the speaker device and the monitor device provided on the side of the transmitting unit 1, the audio signal reproduced from the CD-I can be sounded and an image corresponding to the image signal can be displayed.

On the other hand, the RF modulation circuit 5 applies, for example, so-called two-phase PSK (Phase Shift Keying) modulation to the audio data, the image data and the time data from the optical system 4, and outputs them via the output terminal 11. The two-phase PSK-modulated audio data, image data, and time data are digitally transmitted to the receiving unit 15 shown in FIG. 2 via the transmission cable.

The two-phase PSK-modulated audio data, image data and time data supplied to the receiving section 15 shown in FIG. 2 are first supplied to the RF demodulation circuit 21 via the input terminal 20. The RF demodulation circuit 21 adds 2 to each of the audio data, the image data and the time data.
Phase PSK demodulation is performed and these are supplied to the EFM decoder 22.

The EFM decoder 22 includes the two-phase PS.
The K demodulated audio data, image data, and time data are subjected to EFM decoding processing, error correction processing, deinterleaving processing, etc., and the audio data is sent to the D / A converter 23 and the image data is sent to the graphic decoder. 29,
Also, the time data is supplied to the time decoder 31.

As described above, the EFM-encoded data are digitally transmitted from the transmitter 1 shown in FIG. 1 and supplied to the receiver 15. Further, since each of the above-mentioned digitally transmitted data is digital data, it is transmitted regardless of the quality of the transmission cable, and even if it is affected by a jump noise or the like, the EFM is performed.
Since the decoder 22 performs EFM decoding processing and error correction processing and deinterleaving processing, it is reproduced correctly.

The D / A converter 23 forms an audio signal by converting the audio data supplied from the EFM decoder 22 into an analog signal and supplies it to the adder 24. A voice signal from, for example, a microphone 25 is separately supplied to the adder 24. The adder 24 is
The audio signal from the D / A converter 23 and the audio signal from the microphone 25 are added, and the added audio signal is supplied to the speaker device 28 via the volume 26 and the amplifier 27.

As a result, the speaker device 28 produces a voice corresponding to the added voice signal obtained by adding the voice signal obtained by analogizing the voice data reproduced from the CD-I 2 and the voice signal from the microphone 25. .. The level of the added audio signal can be adjusted by the volume 26.

The graphic decoder 29 is connected to the E
The image data from the FM decoder 22 is subjected to predetermined image processing to form an image signal, which is supplied to the monitor device 30. As a result, an image corresponding to the image signal is displayed on the monitor device 30.

Here, the time decoder 31 uses the EFM.
The audio signal from the D / A converter 23 and the image signal from the graphic decoder 29 are controlled to be simultaneously output based on the time data supplied from the decoder 22. That is, the time decoder 31 is
A time shift between the audio data and the image data is detected from the time data supplied from the EFM decoder 22, and the D / A converter 23 or the above is detected according to the detected time shift between the audio data and the image data. Mutes the graphic decoder 29.

As a result, it is possible to generate sound and display an image of sound in time without causing a time difference between the image displayed on the monitor device 30 and the sound generated from the speaker device 28. it can.

As is clear from the above description, in the transmitting / receiving apparatus according to this embodiment, the transmitting unit 1 reproduces the EFM-encoded audio data reproduced from the CD-I2,
The RF modulation circuit 5 converts the image data and time data into two.
PSK modulation is performed and digital transmission is performed to the receiving unit 15 via a transmission cable. In the receiving unit 15, the 2P
The RF demodulation circuit 21 performs 2PSK on the audio data, the image data, and the time data which are SK-modulated and digitally transmitted.
After demodulation, the EFM decoder 22 performs EFM decoding processing, error correction processing and deinterleaving processing.

As a result, since each of the digitally transmitted data is digital data, the data is transmitted regardless of the quality of the transmission cable, and even if it is affected by a jump noise or the like, the EFM decoder 22 is used. Since the EFM decoding process and the error correction process and the deinterleave process are performed, each transmitted data can be accurately reproduced.

Further, when outputting the audio signal corresponding to the audio data subjected to the EFM decoding processing and the image signal corresponding to the image data, the time decoder 31 extracts the time of the audio data and the image data from the time data. The audio signal and the image signal are output at the same time in order to mute the D / A converter 23 or the graphic decoder 31 in accordance with the detected audio data and image data time difference. Therefore, it is possible to perform sound generation and image display at a timed timing.

In the above description of the embodiment, the audio data, the image data, etc. are digitally transmitted from the transmitter 1 to the receiver 15 via the transmission cable, but this is transmitted to the transmitter 1. It goes without saying that the wireless transmission means may be provided, and the reception section 15 may be provided with the wireless reception means so as to transmit and receive the respective data by radio waves or the like.

[0038]

In the transmitting / receiving apparatus according to the present invention, in the transmitting section, the optical disk reproducing means reproduces the coded audio data, image data and time data recorded on the optical disk, and each of the data has a predetermined value. The modulated data is sent to the transmission system, and in the receiving section, the demodulation means demodulates the audio data, the image data and the time data transmitted through the transmission system, and the audio data decoding means is demodulated by the demodulation means. The audio data is subjected to a decoding process, and the image data decoding means performs a decoding process to the image data demodulated by the demodulating means, so that each of the digitally transmitted data is digital data. In addition to being transmitted regardless of the quality of the signal, the demodulating means can accurately reproduce even if it is affected by a jump noise or the like.

Further, in the transmitting / receiving apparatus according to the present invention, the output control means outputs the audio data decoded by the audio data decoding means and the image data decoded by the image data decoding means based on the time data. By outputting at the same time, it is possible to generate sound and display an image at a timing.

[0040]

[Brief description of drawings]

FIG. 1 is a block diagram of a transmission unit of an embodiment of a transmission / reception device according to the present invention.

FIG. 2 is a block diagram of a reception unit of the transmission / reception device of the above embodiment.

FIG. 3 is a block diagram of a transmitter of a conventional transceiver.

FIG. 4 is a block diagram of a receiving unit of a conventional transmitting / receiving device.

[Explanation of symbols]

 1 ・ ・ ・ ・ ・ ・ ・ ・ Transmission unit 2 ・ ・ ・ ・ ・ ・ ・ ・ CD-I 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Spindle motor 4 ・ ・ ・ ・ ・ ・・ Optical system 5 ... RF modulation circuit 6 ... EFM decoder 7 ... D / A converter 8 ... ··· Graphic decoder 15 ···· Reception unit 21 ··· · RF demodulation circuit 22 ··· · EFM decoder 23 ···・ ・ ・ ・ ・ ・ D / A converter 24 ・ ・ ・ ・ Adder 25 ・ ・ ・ ・ ・ Microphone 26 ・ ・ ・ ・ ・ ・ ・ Volume 27 ・ ・ ・ ・・ ・ ・ ・ ・ Amplifier 28 ・ ・ ・ ・ ・ ・ ・ ・ Speaker device 29 ・ ・ ・ ・ ・ ・ ・ ・ Graphic decoder 30 ・ ・ ・ ・ ・ ・ ・ Monitor device 31 ・ ・ ・ ・ ・··Time Inter-decoder

Claims (1)

[Claims] 1. An optical disk reproducing means for reproducing encoded audio data, image data and time data recorded on an optical disk, and a predetermined modulation for each data reproduced by the optical disk reproducing means. A transmission unit for sending to the transmission system, a demodulation unit for demodulating the audio data, the image data and the time data transmitted from the transmission unit via the transmission system, and the audio data demodulated by the demodulation unit. Audio data decoding means for performing processing, image data decoding means for performing decoding processing on the image data demodulated by the demodulation means, audio data decoded by the audio data decoding means, and decoding by the image data decoding means A receiving section having an output control means for simultaneously outputting the converted image data based on the time data. Transmitting and receiving apparatus and butterflies.