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decoding circuit

A decoding circuit, Viterbi decoding technology, applied in the direction of coding, electrical components, code conversion, etc., can solve problems such as data decoding failure, and achieve the effect of good decoding control

Inactive Publication Date: 2015-08-12
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the related art, the Viterbi decoder does not always work properly, causing problems such as data decoding failure
More specifically, data decoding may fail due to inappropriate Viterbi decoding controls in situations where the disc being accessed by the jukebox is not properly recorded
In addition, similar problems can occur in the case of dust or scratches on discs accessed through the jukebox

Method used

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Embodiment Construction

[0016] Certain terms are used throughout the description and claims to refer to particular components. It should be understood by those skilled in the art that manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a basis for distinction. The "comprising" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that the first device is coupled to the second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0017] Please refer to Figure 1A and Figure 1B . ...

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Abstract

A decoding circuit includes: a level adjuster with pattern dependency arranged to generate a plurality of Viterbi target levels with pattern dependency; and a Viterbi decoder arranged to perform Viterbi decoding according to the Viterbi target levels with pattern dependency. A decoding circuit includes a Viterbi decoder arranged to perform Viterbi decoding, and the Viterbi decoder includes a branch metric generator arranged to generate a plurality of branch metrics with pattern dependency according to an input of the Viterbi decoder and a plurality of Viterbi target levels with pattern dependency. In particular, the branch metric generator includes: a plurality of branch metric generation paths arranged to generate a plurality of intermediate values according to the input of the Viterbi decoder and the Viterbi target levels with pattern dependency, respectively; and a selection unit for selecting a portion of the intermediate values as the branch metrics with pattern dependency.

Description

technical field [0001] The present invention relates to Viterbi decoding control, and in particular to decoding circuits operating in response to decoding results and / or multiple Viterbi target levels with pattern dependency. Background technique [0002] In an optical disk drive (such as a Blu-ray Disc (Blu-ray Disc, hereinafter referred to as BD) drive), for decoding data, Viterbi decoding is usually necessary. For example, the read path (read path) of the BD driver may include an optical pickup (optical pickup, hereinafter referred to as OPU) module, a signal processing unit, an analog-to-digital converter (analog-to-digital converter, hereinafter referred to as ADC), A finite impulse response equalizer (finite impulse response equalizer, hereinafter referred to as FIR EQ), a Viterbi decoder and a data decoder. According to the related art, the Viterbi decoder does not always work properly, resulting in problems such as data decoding failure. More specifically, data dec...

Claims

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Application Information

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IPC IPC(8): H03M13/41
CPCH03M13/4107H03M13/3707H03M13/41H03M13/35
Inventor 游志青
Owner MEDIATEK INC
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