KR930022745A - Multi satellite broadcasting receiving system - Google Patents

Abstract

The present invention relates to a multi-satellite broadcasting receiver system capable of receiving all of the signals according to the PAL / SECAM / NTSC broadcasting system currently implemented by satellite broadcasting. The present invention relates to an LNB that converts and tunes a broadcast signal received from a satellite at low frequency. And a BS video tuner, multi video signal processing means for dividing a PAL, SECAM, and NTSC broadcast video signal among baseband output signals output from the BS tuner, and processing the video signal according to a corresponding broadcast method; and outputting from the BS tuner. Among the baseband output signals, multi-audio signal processing means for dividing audio signals suitable for PAL, SECAM and NTSC broadcasting methods and processing them according to the corresponding broadcasting method is selected to select an optimal broadcasting signal for each broadcasting method of PAL, SECAM and NTSC. I will be able to.

Description

Multi satellite broadcasting receiving system

Since this is an open matter, no full text was included.

2 is a system configuration diagram of the present invention.

Claims (5)

LNB and BS tuner for low frequency conversion and tuning of broadcast signals received from satellites, and video signals suitable for PAL, SECAM, and NTSC broadcast methods are divided among baseband output signals outputted from the BS tuner, according to the corresponding broadcast method. PAL including multi video signal processing means for processing and multi audio signal processing means for dividing PAL and audio signals suitable for SECAM and NTSC broadcasting methods among the baseband output signals outputted from the BS tuner and processing them according to the corresponding broadcasting method. Multi-satellite broadcasting reception system characterized in that it is possible to select and receive a broadcast signal that is optimal for each broadcasting method of SECAM and NTSC. 2. The apparatus of claim 1, wherein the multi video signal processing means comprises: first and second de-emphasis circuits (24) and (25) for processing different de-emphasis due to signal differences of respective broadcasting schemes; A first switch unit 41 for switching a circuit output, first to third LPFs 31 to 33 for filtering video signals according to the broadcasting method, and a video for amplifying the plurality of LPF outputs Amplifying unit 60, a second switch unit 42 for switching the output of the video amplifying unit according to the broadcast method to provide to the first and second clamping circuits 27, 28, and the signal according to the broadcast method And a first and second clamping circuit (27) (28) for clamping the first and second video outputs (V ₁ ) and (V ₂ ). The audio signal processing apparatus of claim 1, wherein the multi-audio signal processing means comprises: a first BPF (51) for passing only an audio signal among baseband signals output to a BS tuner, and an audio signal of a PAL / SECAM broadcasting method among the audio output signals of the first BPF; And PAL / SECAM audio processing means for processing an audio signal suitable for PAL / SECAM broadcasting method among the outputs of the third switch unit 43 and the NTSC broadcasting system to switch and output the selected separately. NTSC audio processing means for processing an audio signal suitable for the NTSC broadcasting method among the outputs of the third switch unit 43, and a de-emphasis block for de-emphasizing it according to the PAL / SECAM audio processing means and the NTSC audio processing means. And first to fourth audio signal amplifiers 61 to 64 for amplifying and outputting the output of the de-emphasis block. Multi-satellite broadcasting reception system. The PAL / SECAM audio processing unit according to claim 3, wherein the PAL / SECAM audio processing unit mixes the output of the third switch unit 43 and the oscillation signals of the first and second VCOs 38 and 39 according to the PAL / SECAM broadcasting method. First and second mixers 29 and 30 for producing an intermediate frequency, fourth and fifth switch units 44 and 45 for switching and outputting outputs of the first and second mixers, Second to fifth BPFs 52 to 55 for passing respective narrowband signals and wideband signals among the outputs of the fourth and fifth switch units, and fifth and seventh switches for switching the outputs of the first to fifth BPFs. The first and second demodulators 71 and 72 for demodulating the sixth and seventh switch signals, and the fourth and fifth pass predetermined low-pass signals of the demodulated signals. And a fifth LPF (34) (35) and an eighth switch unit (48) for switching the fourth and fifth LPF outputs to provide the de-emphasis block (26). New system. The method of claim 3, wherein the NTSC audio processing means for demodulating the NTSC audio output signal of the third switch unit 43 and the third demodulator (73) for decoding the demodulated signal by a pulse code modulation method A PCM decoder 67, a D / A converter 68 for converting a digital signal output from the PCM decoder into an analog signal, and an analog signal of the D / A converter are divided into left and right signals and passed through. And a ninth and seventh LPF (36) 37 and a ninth switch unit (49) for switching the sixth and seventh LPF signals to provide the de-emphasis block (26). Broadcast reception system. ※ Note: The disclosure is based on the initial application.