Modulation Methods and Systems
AssigneeMediatek Inc.
InventorsHsin-Cheng Chen, Pi-Hai Liu, Ming-Yang Chao
Life of this patent
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Abstract
A modulation system includes an encoder for transferring data words to tentative code words. A DSV control bit generator determines the value of a DSV control bit according to the data words or the tentative code words to optimize the cumulative DSVs corresponding tentative code words, wherein the DSV control bit generator determines the value of a current DSV control bit when at least a subsequent DSV control bit is detected. A final code word generator generates final code words according to the determined DSV control bit and the tentative code words.
Claims12
A modulation system, comprising:
- an encoder, transferring data words to tentative code words;
- a DSV control bit generator, determining the value of a DSV control bit according to the data words or the tentative code words to optimize the cumulative DSVs corresponding tentative code words, wherein the DSV control bit generator determines the value of a current DSV control bit when at least a subsequent DSV control bit is detected;
- and
- a final code word generator, generating final code words according to the determined DSV control bit and the tentative code words.
A modulation system, comprising:
- an encoder, transferring data words to tentative code words;
- a DSV control bit generator, determining the value of a DSV control bit according to the data words or the tentative code words to optimize the cumulative DSVs corresponding tentative code words, wherein the DSV control bit generator determines the value of a current DSV control bit after a predetermined delay;
- and
- a final code word generator, generating final code words according to the determined DSV control bit and the tentative code words.
A modulation system, comprising:
- an encoder, transferring data words to tentative code words;
- a partial DSV generator, generating partial digital sum values (DSVs) according to the data words or tentative code words;
- a DSV accumulator, cumulating the partial DSVs as cumulative DSVs for possible values of a DSV control bit;
- a DSV control bit generator, determining the value of a DSV control bit according to the cumulative DSVs, wherein the DSV control bit generator determines the value of a current DSV control bit when at least a subsequent DSV control bit is detected;
- and
- a final code word generator, generating final code words according to the determined DSV control bit and the tentative code words.
Dependencies are inferred from the claim text.