On-screen display apparatus and on-screen display generation method
AssigneeSony Corporation
InventorsSeiji Kawa, Takao Inoue
Life of this patent
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Abstract
The present invention allows a device to easily convert an on-screen image in HD format or SD format without increasing the processing load. The device according to an embodiment of the present invention uses the on-screen image D3 in which the number of horizontal pixels is set between horizontal pixel counts of HD format and horizontal pixel counts of SD format. Therefore, the device can utilize a relatively simple conversion ratio when converting the image in HD and SD format. This tremendously reduces the computational processing load. In addition, since the device uses the simple conversion ration, the device can maintain the quality of the on-screen image D3.
Claims10
An on-screen display apparatus comprising:
- an on-screen image generation section generating an on-screen image having a predetermined number of horizontal pixels, said predetermined number of horizontal pixels being set between horizontal pixel counts of high definition television signals and horizontal pixel counts of standard definition television signals;
- a first horizontal pixel conversion section converting the number of horizontal pixels of said on-screen image by using a certain conversion ratio such that the number of horizontal pixels of said on-screen image corresponds to the horizontal pixel counts of said high definition television signals;
- and
- a second horizontal pixel conversion section converting the number of horizontal pixels of said on-screen image by using a certain conversion ratio such that the number of horizontal pixels of said on-screen image corresponds to the horizontal pixel counts of said standard definition television signals.
An on-screen display generation method comprising:
- an on-screen image generation step of generating an on-screen image having a predetermined number of horizontal pixels, said predetermined number of horizontal pixels being set between horizontal pixel counts of high definition television signals and horizontal pixel counts of standard definition television signals;
- and
- a horizontal pixel conversion step of converting the number of horizontal pixels of said on-screen image by using a certain conversion ratio such that the number of horizontal pixels of said on-screen image corresponds to the horizontal pixel counts of said high definition television signals, and converting the number of horizontal pixels of said on-screen image by using a certain conversion ratio such that the number of horizontal pixels of said on-screen image corresponds to the horizontal pixel counts of said standard definition television signals.
Dependencies are inferred from the claim text.