Simultaneous transmission of standard 8-vsb and robust 2-vsb...

H - Electricity – 04 – L

Patent

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H04L 27/02 (2006.01) H04N 21/2383 (2011.01) H04L 1/00 (2006.01)

Patent

CA 2449820

A flexible digital transmission system that improves upon the ATSC A/53 HDTV signal transmission standard. The system includes a digital signal transmitter for generating a first Advanced Television Systems Committee (ATSC) standard encoded 8-VSB bit stream and, for generating an encoded new robust bit stream for transmitting high priority information bits, wherein symbols of the new bit stream are capable of being transmitted according to a transmission mode including: a 2-VSB mode and a 4-VSB transmission mode (MODE,NRP, RPP). The standard 8-VSB bit stream are merged and formatted (330) to be simultaneously transmitted (380) over a terrestrial channel according to a broadcaster defined bit-rate ratio. The transmission system includes a control mechanism for generating information needed for encoding robust packets at a transmitter device. It also includes a mechanism for encoding control parameters (360) and multiplexes the generated information with the standard and robust bit-streams (365) for transmission. A receiver architecture is additionally provided to decode standard and robust bit-streams transmitted by the transmitter device.

L'invention porte sur système numérique souple de transmission amélioré par rapport à la norme ATSC A/53 HDTV. Ledit système comporte un émetteur de signaux numériques produisant un premier courant binaire en codage 8-VSB (bande latérale résiduelle) de la norme ATSC, et par ailleurs un nouveau courant binaire robuste pour la transmission de bits d'information de forte priorité, les symboles du nouveau courant binaire pouvant être transmis selon des mode de transmission incluant le 2-VSB et le 4-VSB (MODE,NRP, RPP). Le courant binaire en mode 8-VSB est fondu et formaté (330) en vue de sa transmission simultanée via un canal terrestre avec un débit défini par le diffuser. Le système comporte en outre: un mécanisme de commande produisant les informations nécessaires pour coder les paquets robustes au niveau de l'émetteur; un mécanisme de codage des paramètres de commande (360), et de multiplexage des informations ainsi produites en vue de leur émission selon les normes et avec des courants binaires robustes (365); ainsi qu'une architecture de récepteur de décodage des normes et des courants binaires robustes émis par l'émetteur.

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