A method of maximum likelihood decoding and a digital information playback apparatus
作者： Yoshinari Takemura , Shigeru Furumiya , Kenji Koishi , Nakajima Takeshi
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摘要: A digital information playback apparatus comprises an A/D converter (14;19;32) that converts a signal into data, maximum likelihood decoder (16;21;33) decodes the quantized data output from to obtain original information, and timing extractor (17;22;34) generates sampling clock used in . The detects response characteristic of record/playback system obtains level fluctuations contained signal, based on survival path obtained as decoding result, control expected multilevel equalized values (16;21;33). fluctuations, component due phase shifts clock.
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