Samsung Electronics Co., Ltd.

Yong-san Kim

Han-Kyu Lee

A multichannel scanning method for M-PIP TV system capable of displaying a plurality of sub-pictures on a main picture is disclosed which includes a first step of initializing the system, a second step of selecting and memorizing image video sources outputting image signals, a third step of successively outputting the image signals to a plurality of positions of the sub-pictures, and a fourth step of terminating the system operation in response to a multichannel scanning termination command. According to the method of the present invention, a multichannel scanning can be automatically carried out, and there is no possibility that a channel having no image signals can be outputted. Especially, even in the case where the number of channels to be scanned is larger than that of the displayable number of sub-pictures, scannings for the total amount channels can be carried out without being subjected to any restriction.

Multichannel scanning method

A mixed simulcast circuit in which the voice signal demodulated in the voice demodulator through the tuner and the voice signal from the outside can be recorded on the recording medium according to the user's desire, then reproduced selectively. The mixed simulcast circuit has first means for recording a signal which is received in the tuner and demodulated in the demodulator, second means for recording the modulated voice signal on the one channel of the recording medium and for recording the voice signal from the external on the other channel thereof, and means for switching selectively one signal, either the voice signal which is demodulated and recorded from tuner or the voice signal, which is recorded from the external, when it reproduced.

Mixed simulcast circuit

An automatic-shift circuit for a sub-picture screen for PIP feature is disclosed. The circuit includes;

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Seoul, South Korea

Yong-san Kim