KR970004635B1 - Video and audio recording method and the circuit for tvcr - Google Patents

Abstract

A microcomputer(14) controls system's driving by scanning various key signals inputted through a key matrix(13). First, confirming whether a video CD key(K3) is inputted, and if a key is inputted, checks whether it is in video CD mode in order to toggle the action mode. If it turns out that current mode is a video CD mode, the microcomputer outputs video CD off signal thru an output port(P1), turning off a CDP(15). Afterward, the microcomputer(14) outputs respectively image/voice switching control signals by way of output ports(P2,P4) and fixes a movable terminal(a1) of a image switching part(17) to a fixing terminal(b1) and a movable terminal(a2) of a voice switching part(18) to a fixing terminal(B2). According to this, broadcasting an image signal(V1) inputted thru a middle frequency processing part(12) passes thru the image switching part(17) and a chroma part(19).

Description

CD and video recording and audio recording method and circuit

1 is a block diagram of a general TV.

Figure 2 is a block diagram showing an embodiment of the video and audio recording circuit of the CD-TV integrated with the present invention.

3 is an exemplary embodiment of a key matrix in FIG.

4 is a signal flow diagram for a video and audio recording method of the present invention.

* Description of the symbols for the main parts of the drawings *

11: tuner, 12: intermediate frequency processing unit,

13: key matrix, 14: microcomputer,

15: CD, 16: VRF,

17: video switching unit, 18: audio switching unit,

19: chroma unit, Mic: microphone,

CPT: Citi.

The present invention relates to a technique for storing a video signal displayed in a video system of the present invention and a song called by a time difference. In particular, a video CD (CD) or a CD in a television receiver used in combination with a VCD or a video CD is used. It relates to a video and audio recording method and a circuit of a CD built-in TV to perform a karaoke function by storing the audio signal input through the microphone along with the video signal displayed on the screen reproduced in (Compact Disc Extended Graphice) .

FIG. 1 is a block diagram of a typical TVCR (TVCR). As shown therein, a tuner 1 for tuning a high frequency signal input through an antenna ANT and converting a broadcast signal of a corresponding channel into an audio and video intermediate frequency 1 And an intermediate frequency processor 2 for processing the audio intermediate frequency output from the tuner 1 to restore the original audio signal, and processing the video intermediate frequency to restore the original video signal. The microcomputer 4 controls the tuner 1 according to a viewer's control command input through the microcomputer 4 and the microcomputer 4 under the control of the microcomputer 4. V 5 for recording or reproducing already recorded video and audio signals, and video and audio outputted from the intermediate frequency processor 2 under the control of the microcomputer 4. An audio (A) / video (V) switching unit 6 for selecting a call or for reproducing and outputting a video signal and an audio signal from the VRL 5 and a video signal output from the A / V switching unit 6. Is composed of a chroma unit 7 which converts the signal into a color difference signal and outputs the color difference signal to the CPT.

When the viewer outputs the TV mode selection signal using the key matrix 3, the microcomputer 4 recognizes this and does not output the switching control signal CS to the A / V switching unit 6. The unit 6 is connected to the output terminal of the intermediate frequency processor 2.

In this state, when the channel change key is input, the microcomputer 4 recognizes this and outputs the corresponding tuning data to the tuner 1 so that the broadcast signal of the desired channel is selected by the tuner 1, and the video and audio intermediate of the channel are selected. A frequency signal is output, which is supplied to the chroma unit 7 through the A / V switching unit 6 so that the broadcast program of the channel desired by the viewer is displayed on the CPT.

On the other hand, when the viewer outputs the video mode selection signal using the key matrix 3, the microcomputer 4 recognizes this, and the A / V switching unit 6 outputs a high potential switching control signal CS. The A / V switching unit 6 is connected to the output terminal of the BC5.

In such a state, when the play key is input using the key matrix 3, the microcomputer 4 recognizes the play key and outputs a play control signal to the VR 5, whereby the play is performed on the VR 5. A function is performed, and the output video and audio signals are supplied to the chroma unit 7 through the A / V switching unit 6, and the program reproduced on the tape is displayed on the CPT.

However, in such a general TV, only a function for allowing a user to watch a broadcast program or a program played on a tape is provided. There was a flaw that couldn't support features like karaoke.

Accordingly, an object of the present invention is to provide a method and a circuit for storing a screen and audio at the time when a viewer sings while watching a picture played on a CD (Compact Disc) or CD (Compact Dise Extended Graphics). .

In the video and audio recording method of the present invention for achieving the above object, if the video CD key is input, the video CD mode is checked to determine whether the current video CD mode is turned off. A first process of controlling the video and audio switching unit and controlling the video switching unit and the audio switching unit so that the CD video signal and the audio signal are selected, A second process of sequentially checking the current video signal selection state of the video switching unit when the CD video selection key is input by checking whether the current video CD mode is input; If it is not input, check if karaoke recording key is input. A third process is performed by controlling the phase switching unit so that the video signal reproduced and outputted from the CD is supplied to the VR, and the VSR is driven.

FIG. 2 is a block diagram showing an embodiment of a video and audio recording circuit of a built-in CD TV of the present invention. As shown in FIG. 2, a high frequency signal input through an antenna ANT is tuned to provide a broadcast signal of a corresponding channel. A tuner 11 for converting audio and video intermediate frequencies and an intermediate frequency for processing the audio intermediate frequency output from the tuner 11 to restore the original audio signal and processing the video intermediate frequency to restore the original video signal The tuner 11 is controlled according to a control command of a viewer input through the processing unit 12 and the key matrix 13 so that a desired broadcast channel is selected, and the drive control of the CD 15 or V16 is controlled. The microcomputer 14 which outputs a signal and the video and audio signals recorded on the CD are reproduced and processed under the control of the microcomputer 14, and the voice input from the outside through the microphone Mic. A compact disc player 15 that mixes and outputs a signal with a reproduced audio signal, and records video and audio signals on a tape under the control of the microcomputer 14, or records previously recorded video and audio signals. VCD 16 for reproducing and outputting, a broadcast video signal output from the intermediate frequency processor 12 under control of the microcomputer 14, a video signal for reproducing and outputting from CD 15, and V16. In the video switching unit 17 for selecting an arbitrary video signal from the video signal output from the broadcast audio signal, the CD 15 output from the intermediate frequency processor 12 under the control of the microcomputer 14 Converts the video signal output from the audio switching unit 18 and the video switching unit 17 into a color difference signal by selecting an arbitrary audio signal from the output audio signal and the audio signal reproduced and output from Consisting of the chroma unit 19 output to the CPT, the operation and effect of the present invention configured as described above will be described in detail with reference to FIGS. 3 and 4 as follows.

The microcomputer 14 scans various key signals input through the key matrix 13 configured as shown in FIG. 3 to control the driving of the system. First, check whether or not the video CD key K3 is input. When is input, it is checked whether the current video CD mode is in order to toggle the operation mode. If the current mode is the video CD mode, the video CD off signal is output to the CD 15 through the output port P1. The CD 15 is turned off, and the video / audio switching control signals are output through the output ports P2 and P4, respectively, and are short-circuited to the fixed terminal b1 of the movable terminal a1 of the image switching unit 17. The movable terminal a2 of the voice switching unit 18 is short-circuited to the fixed terminal b2. (S1-S4)

Accordingly, the broadcast video signal V1 output through the intermediate frequency processing unit 12 is displayed on the CPT through the image switching unit 17 and the chroma unit 19, and the intermediate frequency processing unit 12 is displayed. The broadcast voice signal A1 output from the voice is output to the speaker through the voice switching unit 18.

However, if the result of the check in the second step S2 is not the current video CD mode, the video CD on signal is output to the CITIC 15 through the output port P1, from which the CD video signal V2 and the audio signal are output. (V2) is output. However, the microcomputer 14 outputs the video / audio switching control signals through the output ports P2 and P4, respectively, so that the movable terminal a1 of the image switching unit 17 is connected to the fixed terminal c1. The short-circuit and the movable terminal a2 of the sound switching unit 18 are short-circuited to the fixed terminal c2. (S5, S8)

On the other hand, if the video CD key K3 is not inputted as a result of the check in the first step S1, it is determined whether it is the current video CD mode and exits if it is not the video CD mode. If the key is input, check whether the movable terminal a1 of the image switching unit 17 is short-circuited to the fixed terminal b1. The short-circuited, short-circuited to the fixed terminal (c1) outputs the switching signal short-circuited to the fixed terminal (d1), if short-circuited to the fixed terminal (d1) short-circuited to the fixed terminal (b1). (S7-S9)

However, if the CD image selection key K2 is not inputted as a result of the check in the eighth step S8, it is checked whether the karaoke recording kitty K1 is inputted, and if the karaoke recording key K1 is not inputted, the process is terminated. When the moving terminal a1 of the video switching unit 17 is short-circuited to the fixed terminal c1, the switching control signal is output to be short-circuited to the fixed terminal c1, and the audio switching unit 18 is output to the audio switching unit 18. The switching control signal is output so that its movable terminal a2 is short-circuited to the fixed terminal c2, and the recording start signal is output through the output pod P3. (S10-S13)

Accordingly, the video signal V2 reproduced and output from the CD 15 is recorded in the VCD 16 through the video switching unit 17, and at this time, the audio signal input through the microphone Mic is input. 15 and the voice switching unit 18 are recorded on the VRC 16 and output to the speaker on the other hand.

According to the above operation, when the viewer sings while watching the screen displayed on the CD 15 and displayed on the CPT, the screen and the audio signal at that time are recorded in the VRF 16 through the above path.

In addition to the video signal being broadcast in the same manner as described above, the viewer can output the audio signal input through the micro (Mic) and can be recorded on the VCD (16), and the video signal reproduced and output from the CD It can store and output voice signal together.

As described in detail above, the present invention selects a random video signal from a broadcast video signal, a video signal reproduced by a video CD or a CD, and displays the video signal on the Citity according to a viewer's request. When inputted, the selected video signal and audio signal can be output to the outside and can be stored in V-CAL to provide various services without additional equipment.

Claims (2)

When the video CD key is input, it checks whether it is the current video CD mode, turns off the CD if it is not in that mode, and controls the video switching unit and the audio switching unit so that the broadcast video signal and the audio signal are selected. In addition, the first process of controlling the video switching unit and the audio switching unit so that the CD video signal and the audio signal are selected, and if the video CD key is not input, check whether the current video CD mode is selected. A second process of sequentially selecting the current video signal selection state of the video switching unit when the input is input and checking the input of the karaoke recording key if the CD video selection key is not input; To control the video and the video signal To be supplied to the eggs and, a video and audio recording method of the third step on CD embedded TV CR which comprises a V for driving the CR. A tuner 11 for tuning a high frequency signal input through an antenna ANT to convert a broadcast signal of a corresponding channel into an audio and video intermediate frequency, and processing an audio intermediate frequency output from the tuner 11 to process the original voice. A desired broadcast by controlling the tuner 11 according to a control command of a viewer input through an intermediate frequency processor 12 for restoring a signal and processing an image intermediate frequency to restore an original video signal, and a key matrix 13. A microcomputer 14 which allows a channel to be selected and outputs a drive control signal of the CD 15 or V16, and reproduces the video and audio signals recorded on the CD under the control of the microcomputer 14. And a CD (Compact Disc Player) 15 for mixing and outputting a voice signal input from the outside through the microphone (Mic) with the reproduced voice signal, and under the control of the microcomputer 14 V-Cal 16 for recording video and audio signals or reproducing and recording already recorded video and audio signals, and broadcast video signals output from the intermediate frequency processor 12 under the control of the microcomputer 14; The intermediate frequency under the control of the video switching unit 17 and the microcomputer 14 to select an arbitrary video signal from the video signal reproduced and output from the CD 15, the video signal output from the V16 (16) A voice switching unit 18 for selecting an arbitrary audio signal from the broadcast audio signal output from the processor 12, the audio signal output from the CD 15, and the audio signal reproduced and output from the VCD 16, and the video switching. And a chroma unit (19) for converting an image signal output from the unit (17) into a color difference signal and outputting the color signal to a CPT.