Notes

In this case, recording entry in the non-volatile memory, the associated controlled content on external hard drive and another info associated to this entry shall be destroyed. The set-top system of the present invention meets all the “security rules” specified by CableLabs and the DTLA for 5C DTCP, DTCP-IP, and DTCP-USB. how to recover data from external hard disk which is not detecting , cryptographic keys, and rights management control software program are saved and executed solely beneath the secure control of the set-top system. All this info and control software is stored encrypted within the set-top system utilizing the distinctive box key for every set-top system device.
The place of the scaled video window is managed by the PC Windows application in a manner that appears equivalent to present state-of-the-art media heart techniques the place the PC controls the display screen. In this case nevertheless, the PC opens a clean window 802 and a driver on the graphical system interface degree intercepts calls for the creation of video overlay surfaces. The interception or “hooking” of drivers at the GDI stage is a technique that is well known within the art. This data is distributed to the set-top system and utilized by firmware in the set-top system to place a scaled video window 806 within the desired location over the PC's Windows desktop so that it appears inside the frame of the PC “TV viewer” window 804. Other data related to a “TV viewer” window, such as video source selection or channel number may be sent to the set-top as nicely.
In different phrases, the content is bound to that set-top field which recorded it. However, emerging requirements within the cable industry will finally permit the switch and copying of audio/video content recorded with PVR's. The person interface permits opening a resizable “TV viewer” window 804 on the PC's desktop 802.
The techniques used are much like those used on existing state of the art set-top bins with embedded exhausting drives. Embedded hard drives are vulnerable to rogue user assaults since they use commonplace interconnects similar to IDE and SATA, and normal file methods corresponding to Linux. A rogue user might take away an embedded onerous drive, connect it to an open system such as a Linux based PC, and try and make unauthorized copies of embedded content. Therefore a set-top with an embedded drive should incorporate mechanisms to thwart such unauthorized actions. Other existing state-of-the-art systems use an X86 kind processor in the identical system as the set-top processor. In these systems the X86 graphics knowledge is also sent to the set-top frame buffer for compositing.
All protected content is saved encrypted with the field key so solely the originating set-top can decrypt and process such content. Typical purposes embody the EPG, IPPV, VOD, and PVR applications and capabilities. A digital cable set-top helps both the Open Cable Application Platform specification, or the MHP specification on the set-top system. It supports downloadable OCAP or MHP functions from Multi System Operators such as cable corporations, as properly as native set-top system purposes. Such OCAP or MHP applications must adhere to the respective specifications for the safe obtain of such purposes. Other digital cable and Direct Broadcast Satellite set-tops help the corresponding middleware of the service supplier.
Sharing can be achieved via standard protocols similar to NFS or SMB. Software elements which implement the server facet for the PC and the shopper side for the set-top system are freely available. While pre-compiled, able to run server elements exist for the PC operating Windows XP, consumer components might have to be adapted to run on the precise CPU and operating system of the set-top system. The distant sound server encapsulates the audio information into packets appropriate for transmission over a neighborhood area community 905 and transmits it to the remote sound consumer 912 operating on the set-top system 903. The distant sound consumer 912 on the set-top system 903 then extracts the data from the packets and sends it to the set-top system's audio driver 914. The set-top system's audio driver 914 then performs the audio out through its hardware audio subsystem 916 i.e, an audio sign is generated and transmitted through the set-top system's audio connectors 918.
This content is encrypted if it is protected content material or unencrypted whether it is “copy free”. Software operating on the set-top and the PC mediate switch and using the information. This mechanism is designed to make additional unauthorized copies of protected content unusable. For example, a rogue user might make clone copies of hard drives containing “copy once” material. Without this mechanism, each such onerous drive could be linked in flip to the set-top system and then used to make copies to connected DTCP sink devices similar to a DVHS recorder. The rogue consumer could use this procedure to make a limiteless number of copies.
The integrated network supports each PC and set-top media file sharing on the identical community. Set-tops such as the set-top media system of the present invention supporting the DTCP-IP protocol can share PVR recordsdata during which any set-top can play again either protected or unprotected content from any set-top PVR. “Copy free” content material on set-top PVR's may be shared with PC's on the Integrated Network.
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