US 7,817,608 B2Granted

Transitioning to secure IP communications for encoding, encapsulating, and encrypting data

AssigneeWidevine Technologies, Inc.

InventorsReza P. Rassool, Glenn A. Morten, Brian A. Baker

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Abstract

An apparatus, system, and method is directed to transcoding broadcast content, such as in a DVB, ATSC, and MPEG based network, to secure content suitable for an Internet Protocol (IP) based network. In one embodiment, a single multifunctional convergence appliance is employed to enable such transcoding actions as encryption, encoding, and/or encapsulation. For example, in one embodiment, an MPEG transport stream associated with the broadcast content may be transcoded to an IP-based transport stream. In addition, the transport stream may be decrypted, transrated to another rate, and re-encrypted using a different control word for re-encrypting, but a same service key to encrypt the different control word. The system is also enabled to transcode content formatted for the IP-based network to a content format suitable for the broadcast network.

Claims13

Dependent claims

A network device for managing content over a network, comprising:

a input/output interface that is configured to receive input signals including at least one of a IP signal, MPEG Transport over ASI, a DVB signal, an SDI signal, an S-video signal, an AES/EBU signal, or an S/PDIF signal, and to provide an output signal including at least one of a DVB signal, an ATSC signal, an IP signal;
a processor in communication with a display and the input/output interface;
and
a memory in communication with the processor and for use in storing data and machine instructions that causes the processor to perform a plurality of actions, including:
determining an input signal selection;
enabling a selection of a processing action on the input signal, including at least one of filtering of a program stream, rate shaping, encoding, encapsulation, or encryption of the input signal, wherein rate shaping further comprises transcoding of a bit rate of the input signal by decrypting the input signal, employing a service key inside of an EMM to decrypt an ECM to access a first Control Word key, varying a bit rate on the decrypted signal, and re-encrypting the bit rated signal using a second Control Word key, and further encrypting the second Control Word key using the same service key;
determining an output signal format selection;
and
converting the processed input signal into the determined output signal selection.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/470,574Filed 6 Sep 2006 · us provisional application
Priority: 23 Sep 2005
Published: US 2007/0104097 A110 May 2007
Granted: 19 Oct 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04L 63/0464
Wherein the data content is protected, e.g. by encrypting or encapsulating the payload: using hop-by-hop encryption, i.e. wherein an intermediate…
H04N 7/165
Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing: centralised control of user terminal ;…
H04N 7/1675
Systems rendering the television signal unintelligible and subsequently intelligible: providing digital key or authorisation information for…
H04N 21/2343
Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs: involving reformatting…