Image decoding apparatus, semiconductor device, and image decoding method

An image decoding apparatus comprising:

• first to N-th decoding devices which convert input first to N-th image coded data for generating and outputting first to N-th image data by decoding said first to N-th image coded data;
• a memory device for storing said first to N-th image data generated by respective decoding devices;
• first to N-th image format conversion devices for generating first to N-th images by converting any of image data from among said first to N-th image data read from the memory device into respective predetermined image formats determined by input filter parameters, and outputting said first to N-th images in synchrony with input first to N-th vertical image synchronizing signals which are synchronized with each other;
• and
• wherein a non-display period is provided between a common timing of each of said vertical image synchronizing signals and a timing of said image data;
• and
• wherein said filter parameters are multiplexed with the image data in said non-display period.

A semiconductor device comprising:

• a decoding device for generating image data by decoding input image coded data, and for storing the thus generated image data in a memory device;
• a decoded data reading device for reading said image data stored in said memory device in response to an inputting decoded data request signal and for outputting said image data as decoded data signal;
• a first image format conversion device for generating a first image by converting said decoded data signal into a predetermined image format determined by an input first filter parameter, and for outputting said first image in synchrony with an input first vertical image synchronizing signal;
• and
• a second image format conversion device for generating a second image by converting said decoded data signal into a predetermined image format determined by an input second filter parameter, and for outputting said second image in synchrony with an input second vertical image synchronizing signal which is synchronized with said first vertical image synchronizing signal;
• and
• wherein a non-display period is provided between a common timing of each of said first and second vertical image synchronizing signals and a timing of said image data;
• and
• wherein said first and second filter parameters are multiplexed with said decoded data signal in said non-display period.

A semiconductor device comprising:

• a first decoding device for generating first image data by decoding input first image coded data and for storing the generated first image data in a memory device;
• a second decoding device for generating second image data by decoding input second image coded data, and for storing the generated second image data in the memory device;
• a decoded data reading device for reading said first or second image data stored in said memory device in response to an inputting first decoded data request signal and for reading said first or second image data stored in said memory device in response to an inputting second decoded data request signal and for outputting said first and second image data;
• a distribution control device for distributing said first and second image data as a first decoded data signal corresponding to said first decoded data request signal and a second decoded data signal corresponding to said second decoded data request signal;
• a first image format conversion device, which outputs the first decoded data request signal for generating a first image by converting said first decoded data signal into a first predetermined image format determined by an input first filter parameter and for outputting said first image in synchrony with an input first vertical image synchronizing signal;
• and
• a second image format conversion device which outputs the second decoded data request signal for generating a second image by converting said second decoded data signal into a second predetermined image format determined by an input second parameter, and for outputting said second image in synchrony with an input second vertical image synchronizing signal which is synchronized with said first vertical image synchronizing signal;
• and
• wherein a non-display period is provided between a common timing of each of said first and second vertical image synchronizing signals and a timing of said image data;
• and
• wherein said first and second filter parameters are multiplexed with said image data in said non-display period.

An image decoding method for decoding an inputting image coded data and for generating an image data comprising the steps of:

• generating a first image by converting said image data into a predetermined image format determined by an input first filter parameter and outputting the generated first image in synchrony with an input first vertical image synchronizing signal;
• and
• generating a second image by converting said image data into a predetermined image format determined by an input second filter parameter and outputting the generated second image in synchrony with an input second vertical image synchronizing signal which is synchronized with said first vertical image synchronizing signal;
• and
• wherein a non-display period is provided between a common timing of each of said first and second vertical image synchronizing signals and a timing of said image data;
• and
• wherein said first and second filter parameters are multiplexed with said image data in said non-display period.

An image decoding method comprising:

• generating a first image data by decoding an inputting first image coded data;
• generating a second image data by decoding an inputting second image coded data;
• controlling the distribution of said first and second image data to their request sources;
• generating a first image from said requested first image data by converting into a predetermined image format determined by an input first filter parameter and outputting said first image in synchrony with an input first vertical image synchronizing signal;
• and
• generating a second image from said requested second image data by converting into a predetermined image format determined by an input second filter parameter and outputting said second image in synchrony with an input second vertical image synchronizing signal which is synchronized with said first vertical image synchronizing signal;
• and
• wherein a non-display period is provided between a common timing of each of said first and second vertical image synchronizing signals and a timing of said image data;
• and
• wherein said first and second filter parameters are multiplexed with said image data in said non-display period.