TRANSMISSION SYSTEM, COMMUNICATION TERMINAL DEVICE, AND TRANSMISSION METHOD

A transmission system transmits content using a bidirectional communication means and a unidirectional communication means. The transmission system includes: an encryption unit that encrypts the content; a first transmission unit that transmits the encrypted content or an encryption key used in the...

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Bibliographische Detailangaben
Hauptverfasser:	TAKEUCHI Hideto, TABUCHI Yoji, YAGI Manabu, TAIRA Kazuhiko
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A transmission system transmits content using a bidirectional communication means and a unidirectional communication means. The transmission system includes: an encryption unit that encrypts the content; a first transmission unit that transmits the encrypted content or an encryption key used in the encryption, using the unidirectional communication means; and a second transmission unit that transmits, among the encrypted content and the encryption key used in the encryption, data other than the data transmitted by the first transmission unit, using the bidirectional communication means. The first transmission unit retransmits, using the unidirectional communication means, the data transmitted the previous time, in response to a retransmission request via the bidirectional communication means.