Patent ID: 6590726
Filing Date: 2003-07-08
Classification: G11B,H04N

Abstract:
An apparatus for transmitting and receiving digital information including a transmitting part for transmitting digital video information and digital audio information and receiving part for receiving digital video information and digital audio information:wherein the transmitting part comprises: a first compressor which bit-compresses digital video information by a first compression system using discrete cosine transform, a second compressor which bit-compresses digital audio information by a second compression system, a parity signal adder which adds common parity signal for detecting an error to the digital video information and the digital audio information bit-compressed by the first compressor and the second compressor, a modulator which phase-modulates the digital video information and the digital audio information, to which the parity signal has been added by the parity signal adder, and a transmitter which transmits the digital video information and the audio information modulated by the modulator to a transmission path; and wherein the receiving part comprises; a receiver which receives digital information which is digital video information bit-compressed by a first compression system using discrete cosine transform plus digital audio information bit-compressed by a second compression system, and to which has been added a parity signal for error detecting, phase-modulated and transmitted to a transmission path, a demodulator which demodulates the digital information received by the receiver corresponding to the phase-modulation, an error detector which detects an error of the digital information demodulated by the demodulator by use of the parity signal, a first expander which bit-expands video information among the digital information error detected by the error detector corresponding to the first compression system, and a second expander which bit-expands audio information among the digital information error detected by the error detector corresponding to the second compression system.