Abstract:
A video accompaniment apparatus provides various screens of high picture quality by using data recorded on a laser disk or a compact disk and data stored in a memory accompaniment apparatus in which a plurality of accompanied songs and song texts are recorded. The background screen for video display is provided by the optical disk apparatus or by an external video unit; the song text is provided by the memory accompaniment unit; the audio accompaniment is provided by the optical disk unit or the memory accompaniment unit or by an external audio unit; and the user&#39;s voice is combined with the audio accompaniment selected.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a video accompaniment apparatus, and more particularly, to a video accompaniment apparatus which provides high-quality pictures and a variety of music, by integrally forming an optical disk on which video and audio information is recorded and a memory in which a great deal of accompaniment and song text information is stored. 
     In general, a video accompaniment apparatus is connected with a video monitor and audio amplifier, to display the song text information while a song accompaniment is performed. Several types of video accompaniment systems are known, and these include, a laser disk video accompaniment apparatus using a laser disk player (LDP), a compact disk video accompaniment apparatus using a compact disk graphic player (CDGP), and a memory accompaniment apparatus using a memory. 
     Among the various types, the laser disk video accompaniment apparatus is the best in terms of picture quality and sound quality. However, the number of songs recordable on a single laser disk is restricted to only 20 songs or less and the song search time is long. 
     A compact disk video accompaniment apparatus has a sound quality as good as that of a laser disk video accompaniment apparatus. However, since a compact disk video accompaniment apparatus can only record a restricted number of still pictures on the sub-code channel of the compact disk, compared with a laser disk, the coupling characteristic between pictures and music is lowered and the number of songs recordable on a single compact disk is limited to only about 15 songs. 
     In a &#34;Karaoke&#34; compact disk video accompaniment apparatus, as disclosed in U.S. Pat. No. 5,151,793, the video signal demodulated from the optical disk, on which video and audio information is recorded, and the video signal output from an external signal source, e.g., a camcorder, are superimposed, and graphic data corresponding to the song text demodulated from the optical disk is imposed onto the superimposed video. 
     A memory accompaniment apparatus cannot offer sound quality as good as that provided by a laser disk video accompaniment apparatus or a compact disk video accompaniment apparatus but can offer accompaniment and song text information for about 1,000-1,500 songs. Also, a memory accompaniment apparatus can search for a song at high speeds. 
     FIG. 1 shows a memory accompaniment apparatus which provides an accompaniment signal and a caption signal corresponding to the song texts and which is connected with a conventional video monitor and an audio amplifier. A controller 12 for controlling the operation of the apparatus according to a control instruction is connected to the output terminal of an instruction input unit 11 which supplies instructions to the memory accompaniment apparatus. An accompaniment signal generator 13 for generating an accompaniment signal and a caption signal generator 14 for generating a caption signal are connected to the output terminal of the controller 12. An audio synthesizer 16 for synthesizing an accompaniment signal and a voice signal and supplying the synthesized signals to an audio amplifier is connected to the output terminals of the accompaniment signal generator 13 and a voice signal processor 15. The voice signal processor 15, which provides a voice signal to the synthesizer 16, recieves a voice signal via a microphone and processes the voice signal before passing it along to the synthesizer 16. The accompaniment signal generator 13 includes a memory for storing accompaniment information, and the caption signal generator 14 includes a memory for storing song text information. 
     The operation of the memory accompaniment apparatus having the configuration as shown in FIG. 1 will be briefly described. If a specific song is selected by the instruction input unit 11 and an accompaniment starting instruction is applied to the controller 12, the controller 12 controls the accompaniment signal generator 13 to cause it to generate an accompaniment signal for the song selected. Simultaneously, the controller 12 controls the caption signal generator 14 to cause it to generate a caption signal for the song selected. The output of the caption signal generator 14 is supplied to an external video monitor. 
     The voice signal output from the voice signal processor 15 is synthesized with the accompaniment signal in the audio synthesizer 16. The voice signal processor 15 processes the voice signal supplied thereto via the microphone. That is to say, the voice signal processor 15 regulates the echo, tone, speed, etc. of the voice signal. The voice signal processed in the voice signal processor is synthesized with the accompaniment signal output from the accompaniment signal generator 13 in the audio synthesizer 16, and the synthesized signal is supplied to an audio amplifier or the like. 
     Since the memory accompaniment apparatus described stores a lot of songs but does not store video information apart from the caption, the caption corresponding to the song texts should be displayed on the screen of a video monitor or should be superimposed onto a video signal supplied from an external video signal input source. 
     If a memory accompaniment apparatus, such as shown in FIG. 1, or a conventional video accompaniment apparatus using an optical disk is used independently, the user cannot avoid the drawbacks of each apparatus. If the optical disk player and the aforementioned memory accompaniment apparatus are integrally formed, convenience to the user can be greatly improved by compensating for the respective drawbacks of each type of video accompaniment apparatus. 
     SUMMARY OF THE INVENTION 
     Therefore, to solve the aforementioned problems, an object of the present invention is to provide a video accompaniment apparatus which is integrally formed of an optical disk player providing high quality picture and sound and a memory accompaniment apparatus providing a rapid search and a large selection of songs. 
     To accomplish the above object, there is provided: an optical disk reproducing apparatus, including an optical disk reproducing signal processor for reproducing and outputting video and audio signals by reading information recorded on an optical disk, and a video accompaniment apparatus. The video accompaniment apparatus according to the present invention includes: 
     a memory accompaniment unit for outputting an accompaniment-purpose caption signal and an audio accompaniment signal by reading the song text and accompaniment information for a given song selected from among plural songs stored in a memory; 
     a video output unit for outputting a synthesized video signal by mixing the video signal output from the optical disk reproducing signal processor and the accompaniment-purpose caption signal output from the memory accompaniment unit; and 
     an audio output unit for outputting a synthesized audio signal formed by mixing the accompaniment signal output from the memory accompaniment unit with a user voice signal corresponding to a user&#39;s voice; 
     wherein the optical disk reproducing apparatus and the memory accompaniment unit are integrally formed. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The above objects and other advantages of the present invention will become more apparent from the following description of a preferred embodiment thereof with reference to the attached drawings in which: 
     FIG. 1 is a block diagram of a conventional memory accompaniment apparatus; and 
     FIG. 2 is a block diagram showing an embodiment of the video accompaniment apparatus according to the present invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The apparatus shown in FIG. 2 consists of: an optical disk reproducing signal processor 100 for outputting a video signal PI and an audio signal AU by reading the information recorded on an optical disk, a memory accompaniment unit 200 for outputting an accompaniment-purpose caption signal CP and an accompaniment signal AC stored in a memory, a voice signal processor 300 for processing and outputting therefrom a user voice signal corresponding to a user&#39;s voice, a video output unit 400 for outputting a video signal, an audio output unit 500 for outputting an audio signal, a controller 600 for controlling the respective units 100 to 500, and an instruction input unit 610 for delivering instructions to the controller 600. 
     The optical disk reproducing signal processor 100 includes a pick-up 110 for picking up the signal recorded on the optical disk, a servo 120, a video signal reproducer 130 and an audio signal reproducer 140. The output terminal of the pick-up 110 is connected to the respective input terminals of the servo 120, the video signal reproducer 130 and audio signal reproducer 140. The control terminal of the pick-up 110 is connected with the output terminal of the servo 120. 
     The video output unit 400 includes a first selector 410, a second selector 420, a video synthesizer 430 and a third selector 440. A first selectable input terminal of first selector 410 is connected to the output terminal of the video signal reproducer 130, a second selectable input terminal of first selector 410 is connected to a first external video source input terminal V1, and an output terminal of first selector 410 is connected to a first input terminal of the video synthesizer 430. A first selectable input terminal of second selector 420 is connected to the caption signal output terminal of the memory accompaniment unit 200, a second selectable input terminal is connected to a second external video source input terminal V2, and the output terminal of second selector 420 is connected to a second input terminal of the video synthesizer 430 as well as to an input of the third selector 440. As such, the first input terminal of the video synthesizer 430 is connected to the output terminal of the first selector 410, and the second input terminal is connected to the output terminal of the second selector 420. A first selectable input terminal of third selector 440 is connected to the output terminal of the video synthesizer 430, and a second selectable input terminal of third selector 440 is connected to the output terminal of second selector 420. 
     Also, the audio output unit 500 includes a fourth selector 510, an audio synthesizer 520 and a fifth selector 530. A first selectable input terminal of fourth selector 510 is connected to the output terminal of the audio signal reproducer 140, a second selectable input terminal of fourth selector 510 is connected to the accompaniment signal output terminal of the memory accompaniment unit 200, and a third selectable input terminal of fourth selector 510 is connected to an external audio source input terminal S. A first input terminal of the audio synthesizer 520 is connected to the output terminal of the fourth selector 510, and a second input terminal of audio synthesizer 520 is connected to the output terminal of the voice signal processor 300. A first selectable input terminal of the fifth selector 530 is connected to the output terminal of the audio synthesizer 520, and a second selectable input terminal of fifth selector 530 is connected to the output terminal of the voice signal processor 300. 
     An input terminal of the controller 600 is connected to an output terminal of the instruction input unit 610 having input keys mounted either in a remote control or set therein, or both. 
     The operation of the video accompaniment apparatus having the configuration as shown in FIG. 2 will now be described. 
     The video accompaniment apparatus according to the present invention is designed to perform all of the general functions of an optical disk player and a conventional video accompaniment apparatus. In other words, when the functions of an optical disk player are performed, the adjustments of the elements for normal/select/random reproduction mode selection are all performed. Also, when the functions of a conventional video accompaniment apparatus are performed, the adjustment of song selection, tone and speed is also performed. 
     First, a video signal processing operation with respect to the background screen and caption will be described. 
     If information on the optical disk is to be reproduced, the controller 600 controls the conventionally identified operations of the servo 120 and the pick-up 110 to cause the pick up to read digital signals recorded on the optical disk, process the signals digitally, modulate the signals into high-frequency signals, and then output the signals to the video signal reproducer 130 and the audio signal reproducer 140, respectively. The detailed configuration and operation of an optical disk reproducing signal processor which reproduces video and audio signals recorded on an optical disk are disclosed in U.S. Pat. No. 5,151,793. 
     The video signal reproducer 130 band filters the output signals of the pick up 110 with respect to the band of the video signal, amplifies and demodulates the video signal, and supplies the video signal PI to the video synthesizer 430 as an input thereto, via the first selectable input terminal of the first selector 410. 
     The memory accompaniment unit 200 supplies the caption signal CP, which is the song text information, to the video synthesizer 430 via the first selectable input terminal of the second selector 420. 
     The video synthesizer 430, to which a background screen signal output from video signal reproducer 130 and a caption signal output from memory accompaniment unit 200 are input, outputs a superimposed video signal whereby the caption signal is displayed as the song text on the background screen. If the instruction for the video signal which a user desires to use as the background screen is input to the controller 600 through the instruction input unit 610, the controller 600 recognizes the instruction and outputs a select control signal to the first selector 410. 
     The first selector 410 selectively outputs either the video signal PI output from the video signal reproducer 130 or a video signal input from the external video signal source through the first external video source input terminal V1, as the background screen to the video synthesizer 430 under the control of the controller 600. Here, a video cassette recorder (VCR), television or camcorder can be used as the external video signal source. 
     Where the optical disk is a laser disk, the caption signal input to the video synthesizer 430 may be a caption signal CP output from the memory accompaniment unit 200 or an external caption signal input through the second external video source input terminal V2. The selection of the caption signal is under control of the controller 600, which responds to instructions from instruction input unit 610 and controls the second selector 420. 
     The second selector 420 selectively outputs the caption signal input to either the first and or the second select input terminal thereof to the video synthesizer 430 under the control of the controller 600. In the case where the optical disk is a compact disk graphic (CD-G) recording, the caption signal recorded in the subcode area on the optical disk is selected to be the input to the video synthesizer 430. 
     As a modified example, the instruction codes which can select the video signal CP with respect to each song of the memory accompaniment unit 200, are input as A, B, C, . . . Z and a variety of different video signals (captions) of A, B, C, . . . Z types are recorded in the laser disk, thereby enabling the video caption for the selected song among the songs stored in the memory accompaniment unit 200 to be reproduced. 
     Also, while the songs recorded in the memory accompaniment unit 200 are reproduced, the content of the background screen is set according to the desired select/random/continuous reproduction mode by means of the instruction input unit 610 in case the video recorded on a laser disk is used as the background screen. 
     The third selector 440 selectively outputs the video signal and caption signal synthesized in the video synthesizer 430 or the caption signal under the control of the controller 600. 
     Next, the processing operation of the audio signal used as the accompaniment signal will be described. 
     The audio signal reproducer 140 of the optical disk reproducing signal processor 100 operates to band-filter the output signal of the pick-up 110 with respect to the audio signal band, amplify and demodulate the filtered signal, and supply the audio signal AU to the audio synthesizer 520 as an input signal via the first selectable input terminal of the fourth selector 510. 
     The memory accompaniment unit 200 supplies the accompaniment signal AC to the audio synthesizer 520 through the second selectable input terminal of the fourth selector 510. The memory accompaniment unit 200 has the configuration and performs the operations of the caption signal generator 14 and the accompaniment signal generator 13 as shown and described with reference to FIG. 1. 
     The accompaniment signals are the audio signal AU from the optical disk reproducing signal processor 100, the accompaniment signal AC from the memory accompaniment unit 200, or an external accompaniment signal input from an external audio signal source through the external audio input terminal S. If an instruction for the signal which a user desires to use as the accompaniment signal is input to the controller 600 through the instruction input unit 610, the controller 600 recognizes the instruction and outputs a select control signal to the fourth selector 510. The fourth selector 510 selectively supplies one of the accompaniment signals to the audio synthesizer 520 under the control of the controller 600. The external audio source which supplies an accompaniment signal to the input terminal S can be an audio signal from a television, a radio, or a musical instrument. The audio synthesizer 520 outputs an audio signal by mixing the selected accompaniment signal with a signal representing a user&#39;s voice. 
     The fifth selector 530 selectively outputs either the synthesized audio signal output from the audio synthesizer 520 or the voice signal V0 output from the voice signal processor 300 in accordance with the select control signal output from the controller 600. 
     As described above, in integrally forming an optical disk player and a memory accompaniment apparatus, the video accompaniment apparatus according to the present invention selects and uses the video signal from the optical disk player or the video signal provided from an external signal source as the background screen, and uses the caption signal from the memory accompaniment unit or from an external source as the text of the song, thereby providing various background screens on which the song text appears. The accompaniment signal (i.e. the music) from the optical disk player, from the memory accompaniment unit or from an external signal source is provided at an audio output. As a result there is provided a video accompaniment apparatus which has high quality video and audio, a large selection of video text, and rapid search capability for songs.