TRANSCODER AND PMT UPDATE METHOD

PROBLEM TO BE SOLVED: To provide a transcoder and a PMT (Program Map Table) update method that perform delay control of an update timing of the PMT in a specified period.SOLUTION: A transcoder 1 comprises a transcoding part 10 for transcoding an input TS (Tranceport Stream), a state change detection...

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Bibliographic Details
Main Author OTAKA YUKI
Format Patent
LanguageEnglish
Japanese
Published 08.08.2016
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:PROBLEM TO BE SOLVED: To provide a transcoder and a PMT (Program Map Table) update method that perform delay control of an update timing of the PMT in a specified period.SOLUTION: A transcoder 1 comprises a transcoding part 10 for transcoding an input TS (Tranceport Stream), a state change detection part 11 for detecting a state change of the input TS, a PMT creation part 12 for creating a PMT of an output TS according to the PMT data of the input TS, a delay control part 14 for controlling a delay timing for PMT replacement according to a time related to state change detection, and a PMT replacement part 13 for replacing the PMT of the output TS with the PMT after the state change in the delay timing.SELECTED DRAWING: Figure 1 【課題】所定の期間にＰＭＴの更新タイミングを遅延制御するトランスコーダ及びＰＭＴ（Ｐｒｏｇｒａｍ Ｍａｐ Ｔａｂｌｅ）更新方法を提供する。【解決手段】トランスコーダ１は、入力ＴＳ（Ｔｒａｎｃｅｐｏｒｔ Ｓｔｒｅａｍ）をトランスコード処理するトランスコード処理部１０と、入力ＴＳの状態変化を検知する状態変化検知部１１と、入力ＴＳのＰＭＴデータに基づいて出力ＴＳのＰＭＴを生成するＰＭＴ生成部１２と、状態変化の検知に関する時間に応じてＰＭＴ差替えの遅延タイミングを制御する遅延制御部１４と、出力ＴＳのＰＭＴを遅延タイミングで状態変化後のＰＭＴに差替えるＰＭＴ差替部１３と、を有している。【選択図】図１
Bibliography:Application Number: JP20150019560