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EP0264784A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Convolutional encoder

Assignee: NEC Corp
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Filing: 1987-10-13
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Granted: —
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Expires: 2007-10-13
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Abstract

Abstract An encoding apparatus comprises a converter and a convolutional encoder. The converter translates a k-bit input to an m-bit output, where m is smaller than k, and the k-bit input belongs to one of 2 m subsets of a set of 2 k elements, the m-bit output representing the subset to which the k-bit inputs belong. Each of the subsets has 2 k-m elements and the minimum Hamming distance between any of the 2 k-m elements is equal to or greater than the Hamming distance to be achieved by the encoder. The convolutional encoder is responsive to the k-bit input and the m-bit output of the converter to generate an (n-k)-bit output, where n is greater than k.

Inventors

  • 👤 Mitsuharu C/O Nec Corporation Yano

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 08:18
CPC Classifications
H; H03; H03M; H03M13/00; H03M13/03; H03M13/23

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 109 words
An encoding apparatus comprising: converter means for converting a k-bit input to an m-bit output, said k-bit input belonging to one of 2 m subsets of a set of 2 k elements, said m-bit output representing said one of 2 m subsets, each of said subsets having 2 k-m elements, the minimum Hamming distance between any of said 2 k-m elements being equal to or greater than a Hamming distance to be achieved, where m is smaller than k; and a convolutional encoder having the last-mentioned Hamming distance and responsive to said k-bit input and said m-bit output for generating an (n-k)-bit output, where n is greater than k.
Claim 2
Dependent Claim 109 words
An encoding apparatus comprising: converter means for converting a k-bit input to an m-bit output, said k-bit input belonging to one of 2 m subsets of a set of 2 k elements, said m-bit output representing said one of 2 m subsets, each of said subsets having 2 k-m elements, the minimum Hamming distance between any of said 2 k-m elements being equal to or greater than a Hamming distance to be achieved, where m is smaller than k; and a convolutional encoder having the last-mentioned Hamming distance and responsive to said k-bit input and said m-bit output for generating an (n-k)-bit output, where n is greater than k.
Claim 3
Dependent Claim 77 words
An encoding apparatus as claimed in claim 1, wherein said convolutional encoder comprises: first means connected to said converter for storing the current state of the encoder; second means responsive to the output of said converter means and the output of said first means for generating a signal representative of a subsequent state of said encoder; and third means responsive to the output of said first means and to said k-bit input for generating said (n-k)-bit output.

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