Apparatus and method for processing an image signal in a digital broadcast receiver
First Claim
1. A video decoder of a digital broadcast receiver, comprising:
- a resizing control unit for generating a resizing control signal for resizing a received video data;
a header analyzer for analyzing header information from a decoded video stream and separating and outputting video data;
a variable length decoder for decoding the video data output from the header analyzer into an original pixel data with an original data size using a variable length table;
a dequantizer for dequantizing the decoded video data;
an Inverse Transform (IT) unit for resizing and converting the dequantized frequency-domain video data into a two dimensional spatial domain video data using the resizing control signal; and
a movement compensator unit for compensating for movement of a movement compensation data corresponding to one of the inverse-transformed video data and the separated video data.
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Abstract
A method and apparatus for decoding a coded video data in a digital broadcast receiver. The method includes: determining a resizing control signal for resizing a received video data; analyzing header information from a decoded video stream and separating and outputting a video data; resizing the separated video data by the resizing control signal and decoding the resized video data into an original pixel data with an original data size by using a variable length table; dequantizing the decoded video data; resizing and converting the dequantized frequency-domain video data into a two dimensional spatial domain video data by the resizing control signal; movement compensating for movement of a movement compensation data corresponding to one of the inverse-transformed video data and the separated video data; and converting outputs of the inverse transform unit and the movement compensation unit into display data for a display unit.
136 Citations
50 Claims
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1. A video decoder of a digital broadcast receiver, comprising:
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a resizing control unit for generating a resizing control signal for resizing a received video data;
a header analyzer for analyzing header information from a decoded video stream and separating and outputting video data;
a variable length decoder for decoding the video data output from the header analyzer into an original pixel data with an original data size using a variable length table;
a dequantizer for dequantizing the decoded video data;
an Inverse Transform (IT) unit for resizing and converting the dequantized frequency-domain video data into a two dimensional spatial domain video data using the resizing control signal; and
a movement compensator unit for compensating for movement of a movement compensation data corresponding to one of the inverse-transformed video data and the separated video data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A video decoder of a digital broadcast receiver, comprising:
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a resizing control unit for generating a resizing control signal for resizing received video data;
a header analyzer for analyzing header information from a decoded video stream and separating and outputting video data;
a variable length decoder for decoding the video data output from the header analyzer into an original pixel data with an original data size using a variable length table, the variable length decoder including a resizer, a table converter, and a buffer, the resizer controlling the table converter to decode data in blocks included in the resizing area set by the resizing control signal, and controlling the buffer to store the video data in the resizing area;
a dequantizer for dequantizing the decoded video data;
an Inverse Transform (IT) unit for resizing and converting the dequantized frequency-domain video data into a two dimensional spatial domain video data by the resizing control signal;
a movement compensator unit including movement compensators, one of which is selected by the resizing control signal, the selected movement compensator compensating for movement of a movement compensation data corresponding to one of the inverse-transformed video data and the separated video data; and
a color converter for converting outputs of the inverse transform unit and the movement compensation unit into display data. - View Dependent Claims (20, 21)
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22. A digital broadcast receiver comprising:
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a control unit for generating a channel selection signal using a user selection and generating a resizing control signal for resizing received video data;
a tuner for selecting a channel of a received digital broadcast signal according to the channel selection signal;
a demodulator for demodulating the selected digital broadcast signal;
a decoder including a demultiplexer for separating an audio stream and a video stream from the demodulated digital broadcast signal, a video decoder for decoding data of the separated video stream, and an audio decoder for decoding data of the separated audio stream, the video decoder resizing a decoding area of the received video data based on the resizing control signal output from the control unit and decoding the video data in the resizing area;
a display unit for displaying the decoded video data; and
a memory for storing the digital broadcast signal output from the demodulator in a record mode, the memory including buffers for temporarily storing data processed by the decoder. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A digital broadcast receiver of a portable terminal that includes an RF communication unit for up-converting a transmitted signal to a signal of an RF band and down-converting a received RF signal into a baseband signal and a data processor for demodulating and the decoding the baseband signal, the digital broadcast receiver comprising:
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a control unit for generating a channel selection signal by a user selection and generating a resizing control signal for resizing a received video data based on a display size of the portable terminal;
a tuner for selecting a channel of a received digital broadcast signal according to channel selection signal generated by the control unit;
a demodulator for demodulating the selected digital broadcast signal;
a decoder including a demultiplexer for separating an audio stream and a video stream from the demodulated digital broadcast signal, a video decoder for decoding data of the separated video stream, and an audio decoder for decoding data of the separated audio stream, the video decoder resizing a decoding area of the received video data based on the resizing control signal output from the control unit and decoding the video data in the resizing area;
a display unit for displaying the decoded video data; and
a memory for storing the digital broadcast signal output from the demodulator in a record mode, wherein the memory includes buffers for temporarily storing data processed by the decoder. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41)
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42. A method for decoding a coded video data in a digital broadcast receiver, the method comprising the steps of:
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determining a resizing control signal for resizing a received video data;
analyzing header information from a decoded video stream;
separating and outputting a video data;
resizing the separated video data using the resizing control signal;
decoding the resized video data into an original pixel data with an original data size using a variable length table;
dequantizing the decoded video data;
resizing and converting the dequantized frequency-domain video data into two dimensional spatial domain video data by the resizing control signal;
movement compensating for movement of a movement compensation data corresponding to one of the inverse-transformed video data and the separated video data; and
converting the two dimensional spatial domain video data and the movement compensated data into display data for a display unit. - View Dependent Claims (43, 44, 45, 46, 47, 48)
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49. A method for processing an image in a digital broadcast receiver, the method comprising the steps of:
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generating a channel selection signal according to a user selection;
generating a resizing control signal for resizing a received video data;
selecting a channel of a received digital broadcast signal by channel selection of the control unit;
demodulating the selected digital broadcast signal;
separating an audio stream and a video stream from the decoded digital broadcast signal;
decoding data of the separated audio stream and video stream; and
reproducing and displaying the decoded video and audio data, wherein a decoding area for the video data is resized based on the resizing control signal and the video data in the resized area is then decoded.
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50. A method for processing a broadcast signal of a portable terminal having a wireless communication unit for wireless communication, the method comprising the steps of:
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generating a channel selection signal according to a user selection;
generating a resizing control signal for resizing a received digital broadcast signal based on a display size of the portable terminal;
selecting a channel of a received digital broadcast signal by channel selection of the control unit;
demodulating the selected digital broadcast signal;
separating an audio stream and a video stream from the decoded digital broadcast signal;
decoding data of the separated audio stream and video stream; and
reproducing and displaying the decoded video and audio data, wherein a decoding area for the video data is resized based on the resizing control signal and the video data in the resized area is then decoded.
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Specification