Multi-channel image encoding apparatus and encoding method thereof
First Claim
1. A multi-channel image encoding apparatus for selectively receiving image signals transmitted through a plurality of input channels and encoding the image signals, comprising:
- a channel data processor comprising a frame buffer group including a plurality of frame buffers for each input channel in order to receive a plurality of frame data through the plurality of input channels and to store the plurality of frame data, the channel data processor for selecting data transmitted to the frame buffer group to output the selected data; and
an encoder for encoding image signals output from the channel data processor with a Moving Picture Experts Group method.
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Abstract
A multi-channel image encoding apparatus for selectively receiving image signals transmitted through a plurality of input channels and encoding the image signals. The multi-channel image encoding apparatus includes a channel data processor that has a frame buffer group having a plurality of frame buffers for each input channel in order to receive a plurality of frame data through the plurality of input channels and to store the plurality of frame data, the channel data processor for selecting the data transmitted to the frame buffer group to output the selected data, and an encoder for encoding image signals output from the channel data processor with an MPEG method. According to the multi-channel image encoding apparatus and the encoding method thereof, signals for each channel input through a plurality of input channels can be transmitted in turn regardless of a similarity between the channels and a compression rate is increased, since data of the same channels having a high similarity is compared and encoded.
45 Citations
25 Claims
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1. A multi-channel image encoding apparatus for selectively receiving image signals transmitted through a plurality of input channels and encoding the image signals, comprising:
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a channel data processor comprising a frame buffer group including a plurality of frame buffers for each input channel in order to receive a plurality of frame data through the plurality of input channels and to store the plurality of frame data, the channel data processor for selecting data transmitted to the frame buffer group to output the selected data; and
an encoder for encoding image signals output from the channel data processor with a Moving Picture Experts Group method. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An encoding method of a multi-channel image encoding apparatus for selectively receiving image signals transmitted through a plurality of input channels and encoding the image signals, comprising the steps of:
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selecting the input channels in accordance with a set-up order to receive a unit frame data for the input channels;
storing the signals input through the selected input channels;
outputting the plurality of frame data stored for each channel in accordance with a set-up selection order; and
encoding a plurality of frame data output for each channel.
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9. A multi-channel image encoding apparatus for encoding image signals input through a plurality of input channels, comprising:
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a channel data processor for selectively contacting with the plurality of input channels and selectively outputting transmitted image signals for each of the input channels; and
an encoder for encoding signals output from the channel data processor by using a previous frame data stored in a prediction memory provided for each corresponding channel. - View Dependent Claims (10, 11, 12, 13, 16, 17, 18, 19, 20, 21, 22, 24, 25)
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14. An encoding method of multi-channel image encoding apparatus for selectively receiving image signals transmitted through a plurality of input channels and encoding the image signals, comprising the steps of:
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outputting unit frame data transmitted corresponding to the set-up input channel selection order for each channel to the encoder;
selecting a prediction memory of channels corresponding to the input unit frame data among the prediction memory with numbers corresponding to the number of the input channels; and
encoding by using the data previously stored in the prediction memory and frame data of the current input channel.
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15. A multi-channel image encoding apparatus for encoding image signals input through a plurality of input channels, comprising:
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a channel data processor for selectively contacting with the plurality of input channels and selectively outputting transmitted image information for each of the input channels; and
an encoder for calculating a similarity by comparing image signals output from the channel data processor and the previous frame data stored in the frame memory provided for corresponding channels, and selecting one mode among a plurality of encoding modes set up differently for each other in regard to the present frame data in accordance with the calculated similarity and encoding according to the selected encoding mode.
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23. An encoding method of multi-channel image encoding apparatus for selectively receiving image signals transmitted through a plurality of input channels and encoding the image signals, comprising the steps of:
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outputting unit frame data for each channel to the encoder by selecting the input channels in accordance with a set-up encode order;
selecting frame memory of channels corresponding to input unit frame data among frame memory having numbers corresponding to the number of input channels;
calculating a similarity by comparing data previously stored in selected frame memory with frame data of currently inputted channels; and
encoding the present frame data by intra coding method, when the similarity is less than a set-up reference value.
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Specification