Samsung Electronics Co., Ltd.

Hyung-il Jang

Ho-seon Kim

A method of performing trick play on a scrambled data stream, the method comprising: extracting position information corresponding to scrambling information from an input scrambled transport stream; demultiplexing a transport stream of a predetermined position according to the stored position information of the scrambling information and extracting the scrambling information and a scrambled data stream pertaining to the scrambling information; descrambling the extracted scrambled data stream by using the extracted scrambling information; and decoding a reference picture based on the position information.

Method and apparatus for performing trick play on scrambled data stream

Provided are a method and apparatus for reproducing a digital broadcast having different compression formats and a method of recording the digital broadcast so that the digital broadcast may be consistently stored and reproduced regardless of a compression format of the digital broadcast. The method of reproducing a digital broadcast includes receiving a transport stream of the digital broadcast which is provided in a compression format; extracting an original stream of a desired program by demultiplexing the transport stream and extracting metadata from the original stream for reproducing or performing trick-play functions on the original stream; separately storing the original stream and the metadata; and decoding the original stream in accordance with the compression format and displaying the original stream. The method and apparatus allows a user to consistently perform functions on the digital broadcast regardless of a compression format of the digital broadcast.

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Seoul, South Korea

Hyung-il Jang