Abstract: A storing portion is provided for storing a plurality of recordable discs, and a recording device is for recording an accompaniment reproduced by a singalong disc player and a vocal part sang at the accompaniment. A loading device is provided for carrying a disc between the storing portion, and the recording device. An ejecting mechanism is provided for ejecting a recorded disc.

Abstract: Modulation signal carrying composite video signal representing a multiple frame composed of plural small frames corresponding to plural channels and modulation signal carrying digital graphics signal are subjected to frequency multiplexing, and the multiplex signal is recorded to single record medium utilizing its capacity effectively. During regenerating, one small frame and a frame of the graphics signal are displayed simultaneously. The invention relates to such record regenerative method and its apparatus.

Abstract: A signal transmission device transmits digital signals consisting of continuous PCM words in blocks. Adaptive and fixed quantization are selectively used depending upon the changes in the input signal.

Abstract: A method of recording N-channel video signals and M-channel audio signals (N, M being natural numbers) includes the steps of periodically extracting the video signal for one unit period, thereby thinning out the video signal, for each of the N-channel video signals, in turn combining the extracted video signals by a time division multiplexing operation. The method also includes the step of coding each of the M-channel audio signals to form M code trains, compressing in time each of the M code trains by a factor of 1/M or less and dividing each of the M code trains into a plurality of blocks, successively combining each block from the M code trains by a time division multiplexing operation. The video and audio signal obtained by the above multiplex operations are recorded on a single recording medium.