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JP2003134064A Expired / Lapsed JP ⏱️ 0.0 years remaining

Digital broadcast complementing method and digital broadcast receiving system

Assignee: Hitachi Ltd
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Filing: 2001-10-26
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Granted: —
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Expires: 2021-10-26
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Abstract

Abstract Translated from Japanese (57)【要約】 【課題】デジタル放送をたとえば移動体で受信する際 に、瞬断によって映像データが不連続になった場合に は、音声が不自然になってしまう。 【解決手段】本発明では放送電波の瞬断によるデジタル データの欠落を予測し、事前に欠落が予想されるデジタ ルデータを放送局からの通信経由、または放送波経由で 取得して端末側に格納しておく。欠落が発生した際には 欠落したデータを予め用意しておいた補完用データによ り端末側で補完し、放送の途切れを防止する。このとき のデータの欠落予想はデータが完全に欠落するだけを予 測するのではなく、危険が予想される状態をマージンを 持って予測するようにする。 【効果】これにより速やかにデータ補完を行うと共に、 予想外の急激なデジタル電波の途切れによる映像・音声 出力の停止確率を低減することが可能となる。 (57) [Summary] [Problem] When video data is discontinuous due to a momentary interruption when digital broadcasting is received by, for example, a mobile object, sound becomes unnatural. According to the present invention, loss of digital data due to an instantaneous interruption of a broadcast wave is predicted, and digital data which is expected to be lost is obtained in advance via communication from a broadcast station or via a broadcast wave and stored in a terminal. Keep it. When a dropout occurs, the missing data is complemented on the terminal side by the previously prepared supplementary data to prevent interruption of the broadcast. The data loss prediction at this time does not only predict the complete loss of data, but also predicts a state in which danger is expected with a margin. [Effect] This allows data to be complemented promptly, It is possible to reduce the probability of stopping video / audio output due to unexpected sudden interruption of digital radio waves.

Inventors

  • 👤 Takaharu Ishida
  • 👤 隆張 石田
  • 👤 Yukihiro Kawamata
  • 👤 幸博 川股
  • 👤 Osamu Tomobe
  • 👤 友部  修
  • 👤 Kimiya Yamatari
  • 👤 公也 山足

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-09 18:40
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04H; H04H20/00; H04H20/12; H04H60/00; H04H60/09; H04H60/11; H04H60/12

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