Patent number 8542621 is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "Apparatuses and methods consistent with the present invention relate to digital audio broadcasting (DAB), and more particularly, to providing and receiving a video service in DAB.
"Analog audio broadcasting has drawbacks in that the quality of a signal input to an analog audio receiver significantly deteriorates when the analog audio receiver is moving; power efficiency is poor since strong transmission power is required to hide noise; and spectrum efficiency is poor due to the use of different frequencies in neighboring regions to eliminate channel interference. To address these problems, research into digital audio broadcasting (DAB) as a substitute for existing analog radio broadcasting, such as amplitude modulation (AM) and frequency modulation (FM) radio broadcasting, has been conducted.
In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventor's summary information for this patent: "The present invention provides a method of and apparatus for providing and receiving a video service, in which the video service can be provided through a stream mode in digital audio broadcasting (DAB).
"According to an aspect of the present invention, there is provided a method of providing a video service in DAB. The method includes inserting a profile identifier (ID) that specifies an encoding method used to encode a provided video service stream and program type information that indicates a type of the provided video service stream into a fast information channel (FIC) that is different from a service data channel comprising the video service stream; and multiplexing the service data channel and the FIC into a transmission frame for transmission.
"The transmission frame may be a DAB transmission frame and the video service stream may comprise a video data stream or an audio data stream, or both audio and video data streams.
"The profile ID may comprise information that specifies a video coding method.
"The FIC may comprise fast information blocks (FIBs) of a predetermined size and a data field of each of the FIBs comprises at least one fast information group (FIG).
"The FIC may comprise FIBs of a predetermined size, a data field of each of the FIBs comprises at least one FIG and the profile ID and the program type information are included in a single FIG.
"According to another aspect of the present invention, there is provided a method of receiving a video service in DAB. The method includes receiving a DAB transmission frame and analyzing an encoding method and a program type of a received encoded video service stream based on a profile ID and program type information included in a fast information channel FIC of the DAB transmission frame that is received; and decoding the encoded video service stream included in a service data channel that is different from the FIC according to the encoding method and the program type that are analyzed.
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