Three-dimensional video reproduction apparatus, three-dimensional video reproduction method, and integrated circuit

A three-dimensional video reproduction apparatus which reproduces a three-dimensional video, said apparatus comprising:

• a video decoder which decodes a video stream to generate a right-eye video signal and a left-eye video signal which have a parallax with respect to each other;
• a graphics decoder which decodes a graphics stream to generate a right-eye graphics signal and a left-eye graphics signal which have a parallax with respect to each other;
• a synthesizing unit configured to synthesize the right-eye video signal and the right-eye graphics signal to generate a right-eye output signal, and synthesize the left-eye video signal and the left-eye graphics signal to generate a left-eye output signal;
• and
• an output unit configured to reproduce the three-dimensional video by alternately outputting the right-eye output signal and the left-eye output signal generated by said synthesizing unit,
• wherein said graphics decoder includes:
• a decoding unit configured to decode the graphics stream to generate (i) a plane graphics signal, (ii) a right-eye side horizontal shift amount that is a horizontal shift amount of the plane graphics signal for generating the right-eye graphics signal, and (iii) a left-eye side horizontal shift amount that is a horizontal shift amount of the plane graphics signal for generating the left-eye graphics signal;
• and
• a parallax adding unit configured to horizontally shift the plane graphics signal to one of directions by the right-eye side horizontal shift amount to generate the right-eye graphics signal, and horizontally shift the plane graphics signal to the other one of the directions by the left-eye side horizontal shift amount to generate the left-eye graphics signal, and
• said parallax adding unit is configured to overwrite one of the right-eye side horizontal shift amount and the left-eye side horizontal shift amount on the other one of the horizontal shift amounts, and then generate the right-eye graphics signal and the left-eye graphics signal, in the case where one of the right-eye side horizontal shift amount and the left-eye side horizontal shift amount is an even number of pixels and the other one of the horizontal shift amounts is an odd number of pixels.

A three-dimensional video reproduction method of reproducing a three-dimensional video, said method comprising:

• decoding a video stream to generate a right-eye video signal and a left-eye video signal which have a parallax with respect to each other;
• decoding a graphics stream to generate a right-eye graphics signal and a left-eye graphics signal which have a parallax with respect to each other;
• synthesizing the right-eye video signal and the right-eye graphics signal to generate a right-eye output signal, and synthesizing the left-eye video signal and the left-eye graphics signal to generate a left-eye output signal;
• and
• reproducing the three-dimensional video by alternately outputting the right-eye output signal and the left-eye output signal generated in said synthesizing,
• wherein in said synthesizing:
• a common chrominance signal is generated by biasing a synthesis ratio of the right-eye video signal and the right-eye graphics signal in favor of one of the right-eye video signal and the right-eye graphics signal, in a case where (i) adjacent two pixels in the right-eye output signal are represented by the common chrominance signal and (ii) one of the adjacent two pixels is generated using the right-eye video signal and the other one of the adjacent two pixels is generated using the right-eye graphics signal;
• and
• a common chrominance signal is generated by biasing a synthesis ratio of the left-eye video signal and the left-eye graphics signal in favor of one of the left-eye video signal and the left-eye graphics signal, in a case where (i) adjacent two pixels in the left-eye output signal are represented by the common chrominance signal and (ii) one of the adjacent two pixels is generated using the left-eye video signal and the other one of the adjacent two pixels is generated using the left-eye graphics signal.

An integrated circuit which reproduces a three-dimensional video, said integrated circuit comprising:

• a video decoder which decodes a video stream to generate a right-eye video signal and a left-eye video signal which have a parallax with respect to each other;
• a graphics decoder which decodes a graphics stream to generate a right-eye graphics signal and a left-eye graphics signal which have a parallax with respect to each other;
• a synthesizing unit configured to synthesize the right-eye video signal and the right-eye graphics signal to generate a right-eye output signal, and synthesize the left-eye video signal and the left-eye graphics signal to generate a left-eye output signal;
• and
• an output unit configured to reproduce the three-dimensional video by alternately outputting the right-eye output signal and the left-eye output signal generated by said synthesizing unit,
• wherein said synthesizing unit is configured to:
• generate a common chrominance signal by biasing a synthesis ratio of the right-eye video signal and the right-eye graphics signal in favor of one of the right-eye video signal and the right-eye graphics signal, in a case where (i) adjacent two pixels in the right-eye output signal are represented by the common chrominance signal and (ii) one of the adjacent two pixels is generated using the right-eye video signal and the other one of the adjacent two pixels is generated using the right-eye graphics signal;
• and
• generate a common chrominance signal by biasing a synthesis ratio of the left-eye video signal and the left-eye graphics signal in favor of one of the left-eye video signal and the left-eye graphics signal, in a case where (i) adjacent two pixels in the left-eye output signal are represented by the common chrominance signal and (ii) one of the adjacent two pixels is generated using the left-eye video signal and the other one of the adjacent two pixels is generated using the left-eye graphics signal.