Method for synchronizing HDTV format change with on screen display
First Claim
1. A method for synchronizing an on screen display processor with a format of a digital television signal, the method comprising the steps of:
- receiving a new format of the digital television signal;
disabling the on-screen display processor;
assigning an identifier to the format;
providing the identifier to a user interface processor and an on-screen display processor;
providing to the on-screen display processor a further identifier from the user interface processor based on the identifier sent to the user interface processor;
comparing the identifier and the further identifier; and
enabling the on-screen display processor based on the comparison.
1 Assignment
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Accused Products
Abstract
A decoder of a digital television signal includes apparatus for synchronizing changes in the format of the digital television signal to corresponding changes in the format of an on-screen display. The apparatus includes a video decoder that receives the digital television signal, determines the format of the digital television signal and whether this format represents a format change. When the decoder identifies a format change, it generates an output signal indicating the format change and assigns a unique identifier to the format change. This output signal is sent to an on-screen display processor and to a user interface processor. The user interface processor is coupled to the video decoder and to the on-screen display processor to receive the output signal and to generate commands for the on-screen display processor. With one of these commands, the user interface sends the unique identifier received from the decoder to the on-screen display processor. The on-screen display processor is disabled by the decoder when a format change is identified. The on-screen display processor monitors the identifiers received from the decoder and from the user interface and enables the display of on-screen display messages only when the two identifiers are the same.
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Citations
14 Claims
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1. A method for synchronizing an on screen display processor with a format of a digital television signal, the method comprising the steps of:
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receiving a new format of the digital television signal;
disabling the on-screen display processor;
assigning an identifier to the format;
providing the identifier to a user interface processor and an on-screen display processor;
providing to the on-screen display processor a further identifier from the user interface processor based on the identifier sent to the user interface processor;
comparing the identifier and the further identifier; and
enabling the on-screen display processor based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for synchronizing an on-screen display processor to a decoder and a user interface processor in a digital television receiver, the method comprising the steps of:
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(a) determining, in the decoder, a current format of a digital television signal;
(b) comparing the current format with a previous format;
(c) disabling the on-screen display processor based on the comparison in step (b) (d) providing a notification to a user interface processor and an on-screen display processor based on the comparison of step (b);
(e) assigning an identifier to the current format based on the comparison of step (b);
(f) providing the identifier to the user interface processor and the on-screen display processor;
(g) providing the identifier sent to the user interface processor, as a further identifier to the on-screen display processor;
(h) comparing the identifier and the further identifier; and
(i) selectively enabling the on-screen display processor based on the comparison of step (h). - View Dependent Claims (9, 10)
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11. Apparatus for use with a digital television receiver comprising:
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a video decoder which receives a digital television signal, determines a format change of the digital television signal, and provides an output signal including a unique identifier indicating the format change;
a user interface processor coupled to the video decoder and to an on-screen display processor to receive the output signal and propagate the output signal to the on-screen display processor as a further output signal; and
the on-screen display processor coupled to the video decoder and the user interface processor to receive the output signal and the further output signal, respectively, wherein the on-screen display processor compares the unique identifiers of output signal and the further output signal and enables on-screen message displays based on the comparison. - View Dependent Claims (12, 13)
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14. Apparatus for synchronizing a digital television signal and an on-screen display, the apparatus comprising:
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a decoding processor coupled to receive the digital television signal, to determine whether the format of the digital television signal represents a format change, and to generate an output signal based on the format change;
a user interface processor, coupled to the decoding processor and to the on-screen display to receive the output signal and provide the output signal as a further output signal;
an on-screen display processor, coupled to the decoding processor and to the user interface processor to receive the output signal and the further output signal, wherein the on-screen display processor compares the output signal and the further output signal, and enables the on-screen display based on the comparison.
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Specification