High definition display unit and high definition display method

An image display apparatus comprising:

• a display means for selectably displaying at least two of:
• a picture image without an information image;
• said information image without said picture image;
• and, said picture image simultaneously with said information image;
• a user adjustment control means for allowing user adjustment of an image quality of a displayed image;
• and
• an enabler/disabler means for selectively preventing said user adjustment control means from adjusting at least portions of said displayed image containing said information image.

An image display method comprising the steps of:

• providing a display circuit adapted to selectably display at least two of:
• a picture image without an information image;
• said information image without said picture image;
• and, said picture image simultaneously with said information image;
• allowing, via a user adjustment control circuit, user adjustment of an image quality of a displayed image;
• and
• selectively preventing said user adjustment control circuit from adjusting at least portions of said displayed image containing said information image.

A high definition display unit, comprising:

• a tuner for inputting a television signal having both an information signal and a picture signal;
• a digital demodulator for demodulating the output of said tuner;
• a digital decoder for decoding an output of said digital demodulator and outputting an analog signal superposing information on a picture image;
• a video chroma processor receiving said analog signal and having an image quality adjusting circuit;
• an output device for outputting a display signal based upon an output from said video chroma processor;
• and
• a display for displaying an image according to said display signal, wherein:
• a period where both said information and said picture image are superposed is detected;
• and
• said image quality adjusting circuit is disabled according to said detection signal.

A high definition display unit, comprising:

• a tuner for inputting a mixed television signal in which a picture information signal is superposed on a picture signal;
• a digital demodulator for demodulating an output of said tuner;
• a digital decoder for decoding an output of said digital demodulator and outputting it as an analog signal;
• a video chroma processor receiving said analog signal, and having an analog output processing circuit and an image quality adjusting circuit to produce a video chroma processing signal;
• an output device for outputting a display signal based upon said video chroma processing signal;
• and
• a display for displaying an image according to said display signal, wherein:
• a section for separating said picture information signal and a bypass circuit of said separated signal are provided to said video chroma processor;
• a superposed period of said picture signal and said picture information signal is detected to generate a detection signal;
• and
• said bypass circuit is operated according to said detection signal.

A high definition display unit, comprising:

• a tuner for inputting a mixed television signal in which a picture information signal is superposed on a picture signal;
• a digital demodulator for demodulating an output of said tuner;
• a digital decoder for decoding an output of said digital demodulator and outputting it as an analog signal;
• a video chroma processor receiving said analog signal, and having an analog output processing circuit and an image quality adjusting circuit for generating a video chroma processing signal;
• an output device for outputting a display signal based upon said video chroma processing signal;
• a display for displaying an image according to said display signal;
• and
• a detector for detecting a brightness of a display output, wherein:
• a superposed period of said picture signal and said picture information signal is detected;
• and
• for said superposed period, said image quality adjusting circuit is operated according to a detection signal from said detector for detecting the brightness.

A high definition display unit, comprising:

• a tuner for inputting a mixed television signal in which a picture information signal is superposed on a picture signal;
• a digital demodulator for demodulating an output of said tuner;
• a digital decoder for decoding an output of said digital demodulator and outputting it as an analog signal;
• a video chroma processor receiving said analog signal and having an analog output processing circuit and an image quality adjusting circuit, to produce a video chroma processing signal;
• an output device for outputting a display signal based upon said video chroma processing signal;
• and
• a display for displaying an image according to said display signal, wherein:
• a superposed period of said picture signal and said picture information signal is detected;
• for said superposed period, said image quality adjusting circuit-is disabled, and an operating point of said output device is adjusted.

A high definition display unit, comprising:

• a tuner for inputting a mixed television signal in which a picture information signal is superposed on a picture signal;
• a digital demodulator for demodulating an output of said tuner;
• a digital decoder for decoding an output of said digital demodulator and outputting it as an analog signal;
• a video chroma processor for receiving said analog signal, and having an analog output processing circuit and an image quality adjusting circuit for producing a video chroma processing signal;
• an output device for outputting a display signal based upon said video chroma processing signal;
• and
• a display for displaying an image according to said display signal, wherein:
• an adjustment range limiting circuit of said image quality adjusting circuit is provided.

A high definition receive method, comprising steps of:

• a mixed television signal in which a picture information signal is superposed on a picture signal is input to a tuner;
• an output of said tuner is demodulated by a digital demodulator;
• an output of said digital demodulator is decoded and output as an analog signal by a digital decoder;
• said analog output is processed and an image quality thereof is adjusted by a video chroma processor, to produce a video chroma processing signal;
• a display signal based upon said video chroma processing signal is output by an output device;
• an image is displayed on a display according to said display signal;
• a superposed period of said picture signal and said picture information signal is detected;
• and
• said adjustment of image quality is disabled according to said detection signal.

A high definition receive method, comprising steps of:

• a mixed television signal in which a picture information signal is superposed on a picture signal is input to a tuner;
• an output of said tuner is demodulated by a digital demodulator;
• an output of said digital demodulator is decoded and output as an analog signal by a digital decoder;
• said analog output is processed and an image quality is adjusted by a video chroma processor to produce a video chroma processing signal;
• a display signal based upon said video chroma processing signal is output by an output device;
• an image is displayed on a display according to said display signal;
• a superposed period of said picture signal and said picture information signal is detected;
• for said superposed period, said picture information signal is separated from said picture signal by said video chroma processor;
• and
• a separated said picture information signal is bypassed to avoid image quality adjustment by said video chroma processing signal.

A high definition receive method, comprising steps of:

• a mixed television signal in which a picture information signal is superposed on a picture signal is input to a tuner;
• an output of said tuner is demodulated by a digital demodulator;
• an output of said digital demodulator is decoded and output as an analog signal by a digital decoder;
• said analog output is processed and an image quality thereof is adjusted by a video chroma processor to produce a video chroma processing signal;
• a display signal based upon said video chroma processing signal is output by an output device;
• an image is displayed on a display according to said display signal;
• a brightness of a display output is detected to produce a brightness detection signal;
• a superposed period of said picture signal and said picture information signal is detected;
• and
• for said superposed period, said image quality adjustment is adjusted according to said brightness detection signal.

A high definition receive method, comprising steps of:

• a mixed television signal in which a picture information signal is superposed on a picture signal is input to a tuner;
• an output of said tuner is demodulated by a digital demodulator;
• an output of said digital demodulator is decoded and output as an analog signal by a digital decoder;
• said analog output is processed and an image quality thereof is adjusted by a video chroma processor to produce a video chroma processing signal;
• a display signal based upon said video chroma processing signal is output by an output device;
• an image is displayed on a display according to said display signal;
• a superposed period of said picture signal and said picture information signal is detected;
• and
• for said superposed period, an operating point of said output device is adjusted, without adjusting said image quality.

A high definition receive method, comprising steps of:

• a mixed television signal in which a picture information signal is superposed on a picture signal is input to a tuner;
• an output of said tuner is demodulated by a digital demodulator;
• an output of said digital demodulator is decoded and output as an analog signal by a digital decoder;
• said analog output is processed and an image quality thereof is adjusted by a video chroma processor to produce a video chroma processing signal;
• a display signal based upon said video chroma processing signal is output by an output device;
• an image is displayed on a display according to said display signal;
• and
• an image quality adjustment range is limited.