Abstract: Provided are a video-signal switching method and a video receiver having two functions: a switching function between video signals in a currently-active system and in a backup system; and a switching function between two different videos. The present invention provides a video transmission system including video transmitters, a network connected to the video transmitters, and a video receiver connected to the network and configured to receive video streams of two IP-packetized video contents from the video transmitters. The video receiver has: a function of switching from an outputting video stream, which is continuously received but no longer receivable, to the other video stream of the same video content; and functions of stopping receiving one of the two video streams from the video transmitters, receiving the other video stream having a different video content, and switching the outputting video stream to the other video stream thus received.

Abstract: In an example, a method of transforming video data comprises determining, based on variable operational code, a plurality of control parameters for transforming the video data in a transform domain, wherein the operational code maps each of the plurality of control parameters to respective operational code fields, and performing transformation of the video data based on the determined control parameters.

Abstract: Systems, methods, and media for providing selectable video using scalable video coding are provided. In some embodiments, systems for providing selectable video using scalable video coding are provided, the systems comprising: a scalable video coding capable encoder that receives a base content sequence and at least one added content sequence that has different content from the base content stream and that produces at least one SVC stream that includes a basic layer, that corresponds to the base content sequence, and at least one enhanced layer, that corresponds to content in the at least one added content sequence; and a digital processing device that controls whether the at least one enhanced layer in the SVC stream is displayed at a destination for the SVC stream.

Abstract: A video transmission system includes a transceiver module that transmits a video signal to a remote device over at least one communications channel wherein the video signal is transmitted as at least one separate video layer stream chosen from, an independent video layer stream and at least one dependent video layer streams that require the independent video layer for decoding. A control module determines at least one channel characteristic of the at least one channel and chooses the at least one separate video layer stream based on the at least one channel characteristic of the at least one channel.

Abstract: Provided are a device and method for providing a video stream, in which a hash value of a frame is included in the header of a video stream, and authentication information about the header is inserted into the video stream, thus ensuring integrity against the forgery of the video stream. The device includes a base frame encoding unit which encodes a base frame, an enhancement frame encoding unit which encodes an enhancement frame, a frame encryption unit which encrypts the encoded base frame and the encoded enhancement frame, a hash processing unit which calculates hash values for the encrypted base frame and the encrypted enhancement frame and hash values included in headers of previous and subsequent video streams, a header management unit which includes information about the encoded base frame and the encoded enhancement frame and the calculated hash values, in a header, and manages the header, and an authentication information creation unit which creates authentication information about the header.