Decrypting processing device, decrypting processing method and digital broadcast receiving device

Abstract

This invention provides a decryption processing device, decryption processing method and digital broadcast receiving device. A main CPU (11) of a digital broadcast receiver comprises an initialization executing part (111) executing an initialization treatment of an IC card 3. a sub-CPU (21) comprises: an initialization judging part (213) that judges whether the initialization treatment is finished through the initialization executing part (111); a state setting part (214) that sets one of standby states which are an operating state and a energy saving state based on an operation input received by a remote control (4); a finish state keeping part (215) that keeps the state when the initialization treatment of the IC card (3) is finished and under the condition that the initialization judging part (213) judges that the initialization treatment is finished and the standby state is set. Therefore, the image can be incipiently output under the condition that the standby state is shifted tothe operating state.

Description

technical field [0001] The present invention relates to a decryption processing device, a decryption processing method and a digital broadcast receiving device. Background technique [0002] In recent years, with the popularization of digital broadcasting, two-way communication between broadcasting stations and viewers has become possible, and paid broadcasting that charges money for each program has also become possible. In a broadcasting system that broadcasts for a fee, it is necessary to identify viewers and allow viewing of programs only to viewers who permit viewing. For example, in the case of receiving BS digital broadcasting, each receiving device needs an IC card called a B-CAS (BS Conditional Access System) card, in order to decrypt (= decode) the encrypted (= add code (scramble)) broadcast signal (descramble)), a B-CAS card that stores information for decryption is essential for contracting with the broadcasting station (=program provider). [0003] Various dev...

AI Technical Summary

Problems solved by technology

[0005] However, in a conventional digital broadcast receiving device such as the above-mentioned receiving device, when the remote control or the like changes from the standby state (=power saving state) to the power ON state (receivable state: hereinafter referred to as "operating state") Next, since it is necessary to perform initialization processing of a PC (Personal Computer) equipped with an IC card (here, a CPU (Central Processing Unit)) for setting the communication speed, etc., it takes time until the decryption (=decoding) process can be performed, so It takes time until picture is output, and convenience may not be enough

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