TRANSMISSION SERVER, TRANSMISSION DEVICE, RECEPTION DEVICE, AND PROGRAM

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

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: YOKOHATA KAZUNORI, SUJIKAI HISASHI, SUZUKI YOICHI, KOIZUMI YUKI, KUSUNOKI KAZUYA
Format: Patent
Sprache:eng ; jpn
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:To provide a transmission server, a transmission device and a reception device related to digital broadcasting, and a program that enable data retransmission in response to a retransmission request from a reception side by efficiently using communication, based on coded data of error correction codes used in digital broadcasting.SOLUTION: A transmission server 6 of the present invention inputs encoded data generated by a transmission device 2 (3) and stores it for a prescribed period of time, receives, via an IP network 8, a retransmission request packet generated when a reception device 5 cannot correct a bit error of the encoded data, adaptively performs coding rate conversion by puncturing processing according to a packet loss rate in the IP network 8 for the encoded data related to the retransmission request, and re-transmits the data to the reception device 5 by IP packet formation. The transmission device 2 (3) of the present invention sequentially outputs the encoded data to the transmission server 6. The reception device 5 of the present invention repeats the retransmission request until the encoded data obtained through the retransmission request can be decoded within a predetermined time.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、当該再送要求に係る符号化データについてIP網8におけるパケット消失率を応じてパンクチャ処理により適応的に符号化率変換を施し、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