Video processing apparatus and video processing method

1. A video processing apparatus comprising:

an input unit to which a content, in which a 3D video signal and a 2D video signal exist mixedly, is inputted;

a discriminating unit for discriminating whether a video signal of the content which is inputted to said input unit is a 3D video signal or a 2D video signal; and

a frequency converting unit for converting a clock frequency of a video signal of the content which was determined as a 2D video signal by said discriminating unit; and

a video signal output unit for outputting a video signal of the content inputted to said input unit or a video signal of the content whose clock frequency has been converted by said frequency converting unit in accordance with a determination made by the discriminating unit,

wherein said frequency converting unit is configured to convert the clock frequency of a video signal of the content which was determined as a 2D video signal by said discriminating unit into a same clock frequency as a clock frequency of the 3D video signal which is inputted to said input unit,

wherein said video signal output unit is configured to output the 3D video signal inputted to said input unit without converting the clock frequency of the 3D video signal when a video signal of the content inputted to said input unit is determined by the discriminating unit to be the 3D video signal, and

wherein said video signal output unit is configured to output the 2D video signal whose clock frequency has been converted by said frequency converting unit to be the same clock frequency as the 3D video signal inputted to said input circuit when a video signal of the content inputted to said input unit is determined by the discriminating unit to be the 2D video signal.

2. An apparatus according to claim 1 , wherein information showing whether the video signal is the 3D video signal or the 2D video signal is added to said video signal which is inputted to said input unit.

3. An apparatus according to claim 2 , further comprising a multiplexing unit for multiplexing the video signal which is inputted to said input unit and the information showing whether said video signal is the 3D video signal or the 2D video signal.

4. An apparatus according to claim 1 , further comprising:

a control information output unit for outputting the information showing whether the video signal is the 3D video signal or the 2D video signal to said video signal which is inputted to said input unit.

5. An apparatus according to claim 1 , wherein said frequency converting unit converts the clock frequency of said 2D video signal by transmitting a same frame in the 2D video signal a plurality of number of times.

6. An apparatus according to claim 1 , wherein said frequency converting unit converts the clock frequency of said 2D video signal by inserting a frame for displaying an all black screen image into the 2D video signal.

7. An apparatus according to claim 1 , wherein said frequency converting unit converts the clock frequency of said 2D video signal by inserting an interpolation frame formed on the basis of frames in the 2D video signal.

8. A video processing method comprising the steps of:

inputting a content in which a 3D video signal and a 2D video signal exist mixedly;

discriminating whether a video signal of the content which is inputted is a 3D video signal or a 2D video signal;

converting a clock frequency of a video signal of the content which was determined in the discriminating step to be a 2D video signal; and

outputting a video signal of the content inputted or a video signal of the content whose clock frequency has been converted by said frequency converting step in accordance with a determination made in said discriminating step,

wherein said frequency converting step converts the clock frequency of a video signal of the content which was determined as a 2D video signal by said discriminating step into a same clock frequency as a clock frequency of the 3D video signal which is inputted in said input step,

wherein said video signal outputting step outputs the 3D video signal inputted without converting the clock frequency of the 3D video signal when a video signal of the content inputted in said input step is determined by the discriminating step to be the 3D video signal, and

wherein said video outputting step outputs the 2D video signal whose clock frequency has been converted by said frequency converting step to be the same clock frequency as the 3D video signal inputted in said input step when a video signal of the content inputted discriminating by the discriminating step to be the 2D video signal.

9. A method according to claim 8 , wherein information showing whether the video signal is the 3D video signal or the 2D video signal is added to said video signal which is inputted.

10. A method according to claim 9 , further comprising the step of multiplexing the video signal which is inputted and information showing whether said video signal is the 3D video signal or the 2D video signal.

11. A method according to claim 8 , further comprising the steps of:

outputting information showing whether the video signal which is inputted is the 3D video signal or the 2D video signal from a signal line different from a signal line for outputting said video signal.

12. A method according to claim 8 , wherein the clock frequency of said 2D video signal is converted by transmitting a same frame in the 2D video signal a plurality of number of times.

13. A method according to claim 8 , wherein the clock frequency of said 2D video signal is converted by inserting a frame for displaying all black screen image into the 2D video signal.

14. A method according to claim 8 , wherein the clock frequency of said 2D video signal is converted by inserting an interpolation frame which is formed on the basis of frames in the 2D video signal.