Digital video encoder for digital video system

A digital video encoder for a digital video system receiving uncompressed digital video data, the encoder comprising:

• a control unit for outputting a first selection signal corresponding to the size and input speed of the digital video data;
• a first selector for selectively outputting one of a first and second clock in response to the first selection signal;
• a signal dividing circuit for dividing the digital video data into a digital luminance signal and a digital chrominance signal in response to the output of the first selector;
• a luminance signal processing circuit for conditioning the digital luminance signal from the signal dividing circuit;
• a chrominance signal processing circuit for conditioning the digital chrominance signal from the signal dividing circuit;
• and
• a converter circuit for combining the conditioned digital luminance signal and chrominance signal and converting the combined digital signal into an analog composite video baseband signal;
• wherein the luminance signal processing circuit comprises:
• a gain regulator for regulating the gain of the luminance signal from the signal dividing circuit;
• an offset regulator for regulating a voltage offset of the gain-regulated luminance signal;
• a synchronizing signal adder for adding a synchronizing signal to the offset regulated luminance signal;
• and
• a luminance low-pass filter for filtering a low band component of the luminance signal from the synchronizing signal added luminance signal.

A digital video encoder for a digital video system receiving uncompressed digital video data the encoder comprising:

• a control unit for outputting a first selection signal corresponding to the size and input speed of the digital video data;
• a first selector for selectively outputting one of a first and second clock in response to the first selection signal;
• a signal dividing circuit for dividing the digital video data into a digital luminance signal and a digital chrominance signal in response to the output of the first selector;
• a luminance signal processing circuit for conditioning the digital luminance signal from the signal dividing circuit;
• a chrominance signal processing circuit for conditioning the digital chrominance signal from the signal dividing circuit;
• and
• a converter circuit for combining the conditioned digital luminance signal and chrominance signal and converting the combined digital signal into an analog composite video baseband signal;
• wherein the chrominance signal processing circuit comprises:
• a gain regulator for regulating the gain of the chrominance signal from the signal dividing circuit;
• a first interpolator for interpolating the gain-regulated chrominance signal;
• a color difference signal generator for producing color difference signals from the interpolated chrominance signal;
• a second interpolator for interpolating the color difference signals;
• a chrominance low-pass filter for filtering a low band component from the interpolated color difference signals;
• and
• a signal modulator receiving and modulating the filtered chrominance.

A digital video encoder for a digital video system receiving uncompressed digital video data the encoder comprising:

• a control unit for outputting a first selection signal corresponding to the size and input speed of the digital video data;
• a first selector for selectively outputting one of a first and second clock in response to the first selection signal;
• a signal dividing circuit for dividing the digital video data into a digital luminance signal and a digital chrominance signal in response to the output of the first selector;
• a luminance signal processing circuit for conditioning the digital luminance signal from the signal dividing circuit;
• a chrominance signal processing circuit for conditioning the digital chrominance signal from the signal dividing circuit;
• and
• a converter circuit for combining the conditioned digital luminance signal and chrominance signal and converting the combined digital signal into an analog composite video baseband signal;
• wherein the chrominance signal processing circuit comprises:
• a gain regulator for regulating the gain of the chrominance signal from the signal dividing circuit;
• a first interpolator for interpolating the gain-regulated chrominance signal;
• a color difference signal generator for producing color difference signals from the interpolated chrominance signal;
• a second interpolator for interpolating the color difference signals;
• a low-pass filter for filtering a low band component from the interpolated color difference signals;
• and
• a signal modulator modulating the filtered digital chrominance signal.

A digital video encoder for a digital video system receiving uncompressed digital video data, the encoder comprising:

• a control unit for outputting a first selection signal corresponding to the size and input speed of the digital video data;
• a first selector for selectively outputting one of a first and second clock in response to the first selection signal;
• a signal dividing circuit for dividing the digital video data into a digital luminance signal and a digital chrominance signal in response to the output of the first selector;
• a luminance signal processing circuit for conditioning the digital luminance signal from the signal dividing circuit;
• a chrominance signal processing circuit for conditioning the digital chrominance signal from the signal dividing circuit;
• a converter circuit for combining the conditioned digital luminance signal and chrominance signal and converting the combined digital signal into an analog composite video baseband signal;
• a line storage unit for receiving and storing the luminance signal and chrominance signals output from the signal dividing circuit;
• a line comparator for comparing the line information stored in the line information storage unit with currently-input line information and outputting a compared result;
• and
• a line information generator for producing new line information according to the compared result and outputting the new line information as the luminance signal to the luminance signal processing circuit and the chrominance signal to the chrominance signal processing circuit.

A digital video encoder for a digital video system receiving uncompressed digital video data, the encoder comprising:

• a control unit for outputting a first selection signal corresponding to the size and input speed of the digital video data;
• a first selector for selectively outputting one of a first and second clock in response to the first selection signal;
• a signal dividing circuit for dividing the digital video data into a digital luminance signal and a digital chrominance signal in response to the output of the first selector;
• a luminance signal processing circuit for conditioning the digital luminance signal from the signal dividing circuit;
• a chrominance signal processing circuit for conditioning the digital chrominance signal from the signal dividing circuit;
• a converter circuit for combining the conditioned digital luminance signal and chrominance signal and converting the combined digital signal into an analog composite video baseband signal;
• and
• an on-screen display unit for outputting luminance and chrominance components of stored data displayed on a screen and outputting mapping data corresponding to a mapping address to the luminance and chrominance signal processing circuits.

A method for generating an analog composite video baseband signal from digital video data, comprising:

• generating a first selection signal corresponding to the size and input speed of the digital video data;
• selecting between a first or second clock in response to the first selection signal;
• dividing the digital video data into a luminance signal and a chrominance signal in response to the selected clock;
• removing noise from the luminance and chrominance signals;
• synthesizing the luminance and chrominance signals into digital luminance and chrominance signals;
• and
• combining the synthesized signal into a composite video baseband signal;
• and
• converting the combined signal into the analog composite video baseband signal.