Systems and methods for signaling text description purpose and identifier information in video coding
AssigneeSharp Kabushiki Kaisha
InventorSachin G. Deshpande
Life of this patent
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Abstract
A device may be configured to decode video data based on information included in a text description information message. In one example, a text description information message includes a syntax element indicating that the text description information message cancels a persistence of a previous text description information message with the same purpose as the text description information message. In one example, a text description information message includes a syntax element indicating that the text description information message cancels a persistence of a previous text description information message with the same identifier value as the text description information message.
Claims3
A method of decoding video data, the method comprising:
- receiving a text description information message;
- parsing a first syntax element in the text description information message indicating a purpose of the text description information message;
- parsing a second syntax element in the text description information message indicating that the text description information message cancels a persistence of a previous text description information message with the same purpose of the text description information message;
- and
- conditionally parsing a third syntax element and a fourth syntax element in the text description information message, based on the second syntax element indicating that the text description information message does not cancel a persistence of a previous text description information message with the same purpose as the text description information message,
- wherein the third syntax element indicates an identifier value of the text description information message and a value space of the third syntax element is separate for each purpose,
- wherein the fourth syntax element indicates that the text description information message cancels a persistence of a previous text description information message with the same identifier value and purpose as the text description information message.
A device comprising one or more processors configured to:
- receive a text description information message;
- parse a first syntax element in the text description information message indicating a purpose of the text description information message;
- parse a second syntax element in the text description information message indicating that the text description information message cancels a persistence of a previous text description information message with the same purpose as the text description information message;
- and
- conditionally parse a third syntax element and a fourth syntax element in the text description information message, based on the second syntax element indicating that the text description information message does not cancel a persistence of a previous text description information message with the same purpose as the text description information message,
- wherein the third syntax element indicates an identifier value of the text description information message and a value space of the third syntax element is separate for each purpose,
- wherein the fourth syntax element indicates that the text description information message cancels a persistence of a previous text description information message with the same identifier value and purpose as the text description information message.
Dependencies are inferred from the claim text.