JPH0719892U - CD-G decoder device - Google Patents

Abstract

(57) [Abstract] [Object] The present invention enables reproduction of a karaoke CD-G by using an image signal from a digital output terminal of a CD player and an audio signal from a line output terminal. Another object of the present invention is to provide a CD-G decoder device. A CD-G decoder to which a digital signal related to a CD-G image signal is input, an RGB encoder to which an image signal from the CD-G decoder is input, and the RGB
A video output terminal 50 for outputting a full-color image signal from the encoder to the outside, a voice cancel circuit 52 to which an audio signal is input, an echo circuit to which a voice signal is input from a microphone, and a voice cancel circuit and an echo circuit from the echo circuit. A CD is provided with a mixing circuit for inputting and mixing signals, and an audio output terminal 49 for outputting the audio signal output from the mixing circuit to the outside.
-Configure the G decoder device 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a CD-G decoder device capable of reproducing a CD-G, for example.

[0002]

[Prior art]

 Conventionally, for example, when reproducing a CD-G on which a still image is recorded, it is necessary to prepare a dedicated CD player. Such a CD player for CD-G reproduction demodulates a digital signal by CD reproduction into an audio signal by DA conversion, outputs the demodulated audio signal as a line output, and outputs an image signal from the digital signal through a decoder. Then, the RGB encoder outputs it as a color image signal.

When a CD player having such a configuration is made to perform a reproducing operation, an audio signal is demodulated by DA conversion based on the reproduced digital signal and output as an audio signal from the line output terminal of the CD player. At the same time, an image signal is taken out by a decoder based on the reproduced digital signal and is output as a color image signal by an RGB encoder from a video output terminal of a CD player to a TV, a video deck, or the like. As a result, the audio signal is amplified by the amplifier or the like connected to the line output of the CD player, and the reproduced sound is output from the speaker or the like. The image signal is reproduced on a TV screen or magnetically recorded on a video deck.

[0004]

[Problems to be solved by the device]

 However, in the CD player capable of CD-G reproduction configured as described above, a CD reproduction function of extracting an audio signal from a digital signal reproduced by CD reproduction and performing line output as an audio signal, A so-called CD-G decoder function for outputting a video as an image signal by taking out an image signal from the digital signal and performing appropriate processing is integrally formed with each other. Therefore, even if you already own a CD player, it is necessary to purchase an entire CD player capable of playing such a CD-G, which makes it relatively expensive. There was a problem that the existing CD player was wasted.

In view of the above points, the present invention makes it possible to reproduce a CD-G by using the image signal from the digital output terminal of the CD player and the audio signal from the line output terminal. , A CD-G decoder device is provided.

[0006]

[Means for Solving the Problems]

 According to the present invention, the above object is to provide a CD-G decoder to which a digital signal related to a CD-G image signal is input, an RGB encoder to which an image signal from the CD-G decoder is input, and the RGB encoder. The video output terminal that outputs the full-color image signal from the external device, the voice cancel circuit that receives the audio signal, the echo circuit that receives the audio signal from the microphone, and the signals from the voice cancel circuit and the echo circuit. The present invention is achieved by a CD-G decoder device including a mixing circuit that is input and mixed, and an audio output terminal that outputs the audio signal output from the mixing circuit to the outside.

[0007]

[Action]

 According to the above configuration, since the digital signal including the image signal output from the digital output terminal of the CD player or the like is input to the digital input terminal, the CD-G decoder can easily output the CD-G image signal. This image signal is input as a video signal to the video input terminal of a TV, VCR, or the like. When the audio signal output from the line output terminal of the CD player or the like is input to the line input terminal, the voice cancel circuit can erase the human voice portion, and the microphone input can be appropriately input. Since it can be mixed with the reproduced voice, a karaoke-compatible voice signal can be easily reproduced.

Further, in this case, the audio signal from the line output terminal of the audio reproducing apparatus other than the CD player is input to the line input terminal, so that the karaoke performance can be easily performed by using the voice cancel circuit. Since it can be performed, a highly versatile karaoke playback system using an existing audio playback device can be constructed.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 shows a CD-G reproduction system in which an embodiment of a CD-G decoder device according to the present invention and a configuration example of a CD-G compatible CD player connected thereto are combined. In FIG. 1, the CD-G reproduction system 1 is composed of a CD player 10 and a CD-G decoder device 40 connected to the CD player 10.

As shown in FIG. 2, the CD player 10 includes a case 11, a cover 12 for opening and closing a CD mounting portion (not shown) provided on an upper portion of the case 11, and the case. A liquid crystal display unit 13 provided at the center of the front of the liquid crystal display unit 11, various operation switches 14 provided on both sides of the liquid crystal display unit 13, an eject button 15 for opening and closing the cover, and a right side surface of the case 11. It is composed of a volume 16, a headphone jack 17, a mode selector switch 18, a digital output terminal 19, a line output terminal 20 and a DC input terminal 21.

FIG. 3 shows an electrical configuration of the CD player 10. That is, in FIG. 3, the CD player 10 drives and controls the CD reproducing section 23 for reproducing the CD 22 and the spindle motor 23 a of the CD reproducing mechanical section 23, and at the same time, through the servo processor 24, the CD reproducing section 23. A mechanical control unit 25 for controlling the tracking feed motor 23b, the pick-up 23c, etc. of the reproduction unit 23, a digital signal processor 27 to which a CD reproduction signal from the CD reproduction unit 23 is inputted via an RF amplifier 26, It is composed of a DA converter 28 to which a digital signal from the digital signal processor 27 is input, and an audio amplifier 29 to which an analog signal from the DA converter 28 is input.

The audio signal output from the audio amplifier 29 is output from the line output terminal 20 after passing through the mute circuit 30, and after being amplified by the headphone amplifier 31 via the volume 16. , Is output from the headphone terminal 17 to headphones (not shown).

Further, in the CD player 10, the digital signal from the digital signal processor 27 described above can be directly output from the digital output terminal 19 to the outside.

As shown in FIG. 4, the CD-G decoder device 40 according to the embodiment of the present invention includes a case 41, two microphone input terminals 42 and a voice cancel switch 43 provided on the front surface of the case 41. , An echo volume setting switch 44, a microphone volume 45 and a power switch 46, a line input terminal 47, a digital input terminal 48, a line output terminal 49 and a video output terminal 50 provided on the back surface of the case 41, and the case. And a DC input terminal 51 provided on the right side surface of 41. In the illustrated case, the digital input terminal 48 includes both a coaxial connector and an optical fiber connector.

FIG. 5 shows an electrical configuration of the CD-G decoder device 40. The CD-G decoder device 40 receives an audio signal from a line input terminal 47 and also has a voice cancel switch 43. The voice cancel circuit 52 whose operation is turned on and off by the microphone input signal and the microphone input signal from the microphone input terminal 42 are appropriately adjusted by the microphone volume 45, and then input to the mixing circuit 53 and the mixing circuit 53. A part of the signal is input, and an echo circuit 55 controlled by the CPU 54 based on the set value of the echo volume setting switch 44 and a second mixing circuit for mixing the output signals of the mixing circuit 53 and the echo circuit 54. 56, the left and right output signals from the voice cancel circuit 52, and the input signal from the second mixing circuit 56, respectively. The mixing circuits 57 and 58 to be combined, the interface 59 to which the digital signal from the digital input terminal 48 is input, the CD-G decoder 60 to which the output signal from the interface 59 is input, and the CD-G decoder. It is composed of an RGB encoder 61 to which an image signal from 60 is input. Here, the CD-G decoder 60 is controlled by the CPU 54.

The output terminals of the mixing circuits 57 and 58 are connected to the line output terminal 49, and the output of the RGB encoder 61 is connected to the video output terminal 50.

The DC power supply voltage input from the DC input terminal 51 is stabilized by the regulator 62 and then supplied to each of the circuits.

The CD-G playback system 1 according to the embodiment of the present invention is configured as described above and operates as follows.

First, as shown in FIG. 1, the digital output terminal 19 and the line output terminal 20 of the CD player 10 are connected to the digital input terminal 48 and the line input terminal 47 of the CD-G decoder device 40, respectively. The microphone 70 is connected to the microphone input terminal 42 of the CD-G decoder device 40, and the line output terminal 49 and the video output terminal 50 of the CD-G decoder device 40 are connected to the line input terminal and the video for external input of the TV 71. Connect to each input terminal.

From this state, when the CD-G decoder device 40 is set in the CD player 10 and the reproduction operation is performed, the digital signal including the audio signal and the image signal from the digital signal processor 27 of the CD player 10 is reproduced. The digital signal is output from the digital output terminal 19, the digital signal is further converted into an audio signal via the DA converter 28 and the audio amplifier 29, and output from the line output terminal 20.

In this case, normal CD reproduction can also be performed by connecting the line output terminal 20 to a stereo reproduction device or a speaker with an amplifier, or connecting headphones to the headphone terminal 17.

In this way, a digital signal is output from the digital output terminal 19 of the CD player 10, and an audio signal is output from the line output terminal 20.

As described above, in the CD-G decoder device 40, the digital signal is input to the digital input terminal 48 and the audio signal is input to the line input terminal 47. As a result, the audio signal input to the line input terminal 47 is input to the voice cancel circuit 52. Here, the voice cancel circuit 52 removes a frequency component corresponding to a human voice from the audio signal when the voice cancel switch 43 is in the operating state, and when it is not in the operating state, The audio signal is output as it is to the mixing circuits 57 and 58. As a result, the CD-G audio signal is input from the line output terminal 49 to the audio input terminal of the TV 71 via the mixing circuits 57 and 58. Thus, the sound of the CD-G can be reproduced from the speaker of the TV 71.

By the way, the audio signal input from the microphone 70 is adjusted to an appropriate level by the setting of the microphone volume 45, and then given a predetermined echo by the echo circuit 55, and then added to the mixing circuits 57 and 58. And mixed with the audio signal from the voice cancel circuit 52 described above.

As a result, the audio signal from the microphone is mixed with the audio signal of the CD-G reproduction, and a song can be sung through the microphone 70, for example, according to the music by the CD-G reproduction. At that time, when the voice cancel switch 43 is off, it is possible to sing along with the singer playing the CD-G, and when the voice cancel switch 43 is on, the singing voice of the singer playing the CD-G is removed. It is possible to sing a song through the microphone 70 in accordance with a so-called karaoke performance.

Incidentally, in the above embodiment, the reproduction of the CD-G can be performed by the combination of the CD player 10 and the CD-G decoder device 40. Connect to another audio playback device such as a normal CD-G non-compatible CD player, cassette player, MD player, etc. to play back music, etc., and sing through a microphone according to the played back audio signal. It is possible to sing, and by using ordinary CDs, cassette tapes, etc. that are not so-called karaoke, karaoke performance can be easily performed.

[0027]

[Effect of device]

 As described above, according to the present invention, the CD-G can be reproduced by using the image signal from the digital output terminal of the CD player and the audio signal from the line output terminal. An extremely excellent CD-G decoder device can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the configuration of a karaoke CD-G playback system incorporating a CD-G decoder device according to the present invention.

2 shows a configuration example of the CD player in FIG.
(A) is a plan view, (B) is a front view, and (C) is a right side view.

FIG. 3 is a block diagram showing an electrical configuration of the CD player of FIG.

4 shows an embodiment of the CD-G decoder device according to the present invention shown in FIG. 1, (A) is a front view, (B) is a rear view, and (C) is a right side view.

5 is a block diagram showing an electrical configuration of the CD-G decoder device of FIG.

[Explanation of symbols]

 1 CD-G Playback System 10 CD Player 11, 41 Case 12 Cover 13 Liquid Crystal Display 14 Various Operation Switches 15 Eject Button 16 Volume 17 Headphone Jack 18 Mode Selector Switch 19 Digital Output Terminal 20 Line Output Terminal 21, 51 DC Input Terminal 22 CD 23 CD playback unit 24 Servo processor 25 Mechanical control unit 26 RF amplifier 27 Digital signal processor 28 DA converter 29 Audio amplifier 30 Mute circuit 31 Headphone amplifier 40 CD-G decoder 42 Microphone input terminal 43 Voice cancel switch 44 Echo volume 45 Microphone volume 46 power switch 47 line input terminal 48 digital input terminal 49 line output terminal 50 video output terminal 52 voice cancel Circuit 53 mixing circuit 54 CPU 55 echo circuit 56, 57, 58 mixing circuit 59 interface 60 CD-G decoder 61 RGB encoder 62 regulator 70 microphone 71 TV

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04N 9/85 B

Claims (1)

[Scope of utility model registration request] 1. A CD-G decoder to which a digital signal related to a CD-G image signal is input, an RGB encoder to which an image signal from the CD-G decoder is input, and a full-color image signal from the RGB encoder. A video output terminal for external output, a voice cancel circuit for inputting an audio signal, an echo circuit for inputting a voice signal from a microphone, and a mixing circuit for inputting and mixing signals from the voice cancel circuit and the echo circuit And an audio output terminal for outputting the audio signal output from the mixing circuit to the outside,
CD-G decoder device.