Television – Bandwidth reduction system – Data rate reduction
Patent
1997-02-20
2000-03-21
Rao, Anand S.
Television
Bandwidth reduction system
Data rate reduction
348461, 348473, 348553, 348725, 370 60, 370391, 370474, 370537, 455 3, 455 4, H04N 718
Patent
active
060408677
ABSTRACT:
A television signal receiving apparatus and method is provided having channel decode means for receiving a signal with a video signal, a sound signal, a data signal, and additional data multiplexed to perform tuning, demodulation, and error correction on the received signal and a demultiplexor for separating the multiplexed signal to output coded data of each of the video signal, the sound signal, and the data signal and for extracting service information as one of additional data. A storage device is provided for storing the service information extracted from the demultiplexor, together with a write controller for controlling writing into the storage device, and a read controller for controlling reading of the storage device according to a user command entered by a user. A source decoder is also provided for decoding the coded data outputted from the demultiplexor using the information outputted from said storage device to output the video signal, the sound signal, and the data signal. The storage device records the service information supplied from the demultiplexor, and the read controller performs control such that necessary data are read from the storage device as required by the user, thereby enhancing the speed of processing associated with the service information to provide a quick response to the user requirement. Also, the write controller can control storage such that only necessary information for the next processing operation is stored, thereby reducing the size of the storage device which is necessary.
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European Telecommunications Standards Institute ETSI Secretariat, pp. 3-62; Reference No. DE/JTC-DVB-5.
Bando Yumi
Murata Toshinori
Okamura Takumi
An Shawn S.
Hitachi , Ltd.
Rao Anand S.
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