Image processing apparatus, image processing method, and computer program
First Claim
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1. An image processor for processing a video signal, comprising:
- aspect ratio information acquisition means for acquiring aspect ratio information about an original video signal by detecting a video identification signal that has been superimposed on the original video signal, wherein the acquired aspect ratio information is a two-bit code indicating a process of aspect ratio conversion on the original video signal;
aspect ratio conversion means for carrying out the process of aspect ratio conversion on the original video signal based on the acquired aspect ratio information to generate a processed video signal representing an image of the original video signal having a roundness of 1, wherein the aspect ratio conversion means has an operation mode in which the aspect ratio of the original video signal is changed automatically based on information about the original video signal, and an operation mode in which the aspect ratio of the original video signal is changed using a fixed scaling factor determined without referring to the original video signal;
background signal generation means for generating a background video signal serving as a background of the processed video signal; and
video signal combination means for executing a process of combining the processed video signal and the background video signal, both having been subjected to aspect ratio conversion, to generate a synthesized video signal.
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Abstract
Video signals such as television reception signals are recorded in a suitable manner taking into consideration the use of external devices each having a different aspect ratio. The aspect ratio of an original video signal is converted so that the image has roundness of 1 and has the maximum size fitting in the particular screen reproducing the recorded video signal. Then, a background signal of a size the same as the screen size or a size needed for video combination is generated, and the result is added around the video signal to generate any desired video signal size. In such a manner, the recorded image has the aspect ratio matching that of the reproduced image.
9 Citations
16 Claims
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1. An image processor for processing a video signal, comprising:
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aspect ratio information acquisition means for acquiring aspect ratio information about an original video signal by detecting a video identification signal that has been superimposed on the original video signal, wherein the acquired aspect ratio information is a two-bit code indicating a process of aspect ratio conversion on the original video signal; aspect ratio conversion means for carrying out the process of aspect ratio conversion on the original video signal based on the acquired aspect ratio information to generate a processed video signal representing an image of the original video signal having a roundness of 1, wherein the aspect ratio conversion means has an operation mode in which the aspect ratio of the original video signal is changed automatically based on information about the original video signal, and an operation mode in which the aspect ratio of the original video signal is changed using a fixed scaling factor determined without referring to the original video signal; background signal generation means for generating a background video signal serving as a background of the processed video signal; and video signal combination means for executing a process of combining the processed video signal and the background video signal, both having been subjected to aspect ratio conversion, to generate a synthesized video signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An image processing method for processing a video signal, comprising:
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an aspect ratio information acquisition step of acquiring aspect ratio information about an original video signal by detecting a video identification signal that has been superimposed on the original video signal, wherein the acquired aspect ratio information is a two-bit code indicating a process of aspect ratio conversion on the original video signal; an aspect ratio conversion step of carrying out the process of aspect ratio conversion on the original video signal based on the acquired aspect ratio information to generate a processed signal representing an image of the original video signal having a roundness of 1, wherein the process of aspect ratio conversion includes an operation mode in which the aspect ratio of the original video signal is changed automatically based on information about the original video signal, and an operation mode in which the aspect ratio of the original video signal is changed using a fixed scaling factor determined without referring to the original video signal; a background signal generation step of generating a background video signal serving as a background of the processed video signal; and a video signal combination step of combining the processed video signal and the background video signal, both having been subjected to aspect ratio conversion, to generate a synthesized video signal. - View Dependent Claims (11, 12, 13, 14, 16)
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15. A computer program embedded on a computer-readable medium, the computer program configured to execute, on a computer system, a process of processing a video signal, comprising:
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an aspect ratio information acquisition step of acquiring aspect ratio information about an original video signal by detecting a video identification signal that has been superimposed on the original video signal, wherein the acquired aspect ratio information is a two-bit code indicating a process of aspect ratio conversion on the original video signal; an aspect ratio conversion step of carrying out the process of aspect ratio conversion on the original video signal based on the acquired aspect ratio information to generate a processed video signal representing an image of the original video signal having a roundness of 1, wherein the process of aspect ratio conversion means includes an operation mode in which the aspect ratio of the original video signal is changed automatically based on information about the original video signal, and an operation mode in which the aspect ratio of the original video signal is changed using a fixed scaling factor determined without referring to the original video signal; a background signal generation step of generating a background video signal serving as a background of the processed video signal; and a video signal combination step of combining the processed video signal and the background video signal, both having been subjected to aspect ratio conversion, to generate a synthesized video signal.
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Specification