TRANSMISSION SERVER, TRANSMISSION DEVICE, RECEPTION DEVICE, AND PROGRAM

To provide a transmission server, a transmission device and a reception device for digital broadcasting, and a program that efficiently enable data retransmission in response to a retransmission request from a receiving side using communication based on coded data of an error correction code used in...

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Main Authors YOKOHATA KAZUNORI, SUJIKAI HISASHI, TAKADA MASAYUKI, SUZUKI YOICHI, KOIZUMI YUKI
Format Patent
LanguageEnglish
Japanese
Published 11.11.2021
Subjects
BROADCAST COMMUNICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:To provide a transmission server, a transmission device and a reception device for digital broadcasting, and a program that efficiently enable data retransmission in response to a retransmission request from a receiving side using communication based on coded data of an error correction code used in digital broadcasting.SOLUTION: A transmission server 6 of the present invention is supplied with coded data of an error correction code related to digital broadcasting generated by a transmission device 2 (3), stores the coded data for a predetermined time, receives, through an IP network 8, a retransmission request packet generated when a reception device 5 cannot correct a bit error of the coded data, changes a coding rate of the coded data related to the retransmission request while determining, according to communication quality, whether the coding rate is to be increased or decreased, and re-transmits it to the reception device 5 by IP packet formation. The transmission device 2 (3) of the present invention sequentially outputs the coded data to the transmission server 6. The reception device 5 of the present invention repeats the retransmission request until decoding within a predetermined time by using the coded data obtained through the retransmission request.SELECTED DRAWING: Figure 1 【課題】デジタル放送で利用する誤り訂正符号の符号化データを基に、効率的に、通信を利用して受信側からの再送要求に応じてデータ再送を可能とする送信サーバ、デジタル放送に係る送信装置及び受信装置、並びにプログラムを提供する。【解決手段】本発明の送信サーバ６は、送信装置２（３）で生成されたデジタル放送に係る誤り訂正符号の符号化データを入力して所定時間分を保存し、ＩＰ網８経由で受信装置５にて符号化データのビット誤りが訂正できなかったときに生成される再送要求パケットを受信し、再送要求に係る符号化データについて通信品質を応じてよりも高くするか低くするかを区別して変更しＩＰパケット形成で受信装置５に向けて再送する。本発明の送信装置２（３）は当該符号化データを順次、送信サーバ６に出力する。本発明の受信装置５は再送要求を経て得られた符号化データを用い所定時間内に復号できるまで再送要求を繰り返す。【選択図】図１
Bibliography:Application Number: JP20200082704