Channel adaptive video transmission method, apparatus using the same, and system providing the same
First Claim
1. A channel adaptive video transmission method comprising:
- receiving state information relating to performances of respective mobile terminals from at least one mobile terminal that intends to perform a video stream service through a wireless network;
determining a size of an image by selecting a specified spatial layer bit stream on the basis of the state information of the mobile terminal from a plurality of spatial layer bit streams generated at different bit rates during encoding of the bit stream;
selecting a specified time and a signal to noise ratio (SNR) layer bit stream by increasing or decreasing a time of the image and a layer position of the SNR layer bit stream on the basis of network parameters included in the state information of the mobile terminal; and
transmitting the bit stream generated by extracting the specified spatial layer bit stream of the selected layer to the mobile terminal.
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Abstract
A video transmission method is provided, which includes receiving state information from at least one mobile terminal that intends to perform a video stream service through a wireless network, determining a size of an image by selecting a specified spatial layer bit stream on the basis of the state information of the mobile terminal from a plurality of spatial layer bit streams generated at different bit rates during encoding of the bit stream, selecting a specified time and an SNR layer bit stream by increasing or decreasing time of the image and a layer position of the SNR layer bit stream on the basis of network parameters included in the state information of the mobile terminal, and transmitting the bit stream generated by extracting the specified layer bit stream of the selected layer to the mobile terminal.
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Citations
15 Claims
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1. A channel adaptive video transmission method comprising:
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receiving state information relating to performances of respective mobile terminals from at least one mobile terminal that intends to perform a video stream service through a wireless network; determining a size of an image by selecting a specified spatial layer bit stream on the basis of the state information of the mobile terminal from a plurality of spatial layer bit streams generated at different bit rates during encoding of the bit stream; selecting a specified time and a signal to noise ratio (SNR) layer bit stream by increasing or decreasing a time of the image and a layer position of the SNR layer bit stream on the basis of network parameters included in the state information of the mobile terminal; and transmitting the bit stream generated by extracting the specified spatial layer bit stream of the selected layer to the mobile terminal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A channel adaptive video transmission apparatus comprising:
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an encoder which encodes a high picture quality digital video stream, and outputs the video stream; a wireless module which receives state information relating to performances of respective mobile terminals from at least one mobile terminal through a wireless network; a processor which executes an image size determination unit and a control unit, wherein the image size determination unit is configured to determine a size of an image by selecting a specified spatial layer bit stream based on the state information of the at least one mobile terminal output from the wireless module from spatial layer bit streams of the video streams output from the encoder, and wherein the control unit is configured to select a specified time and a signal to noise ratio (SNR) layer bit stream from the video stream of which the image size has been determined by increasing or decreasing time of the image and a layer position of the SNR layer bit stream based on network parameters included in the state information of the at least one mobile terminal, and transmits a bit stream generated by extracting the specified spatial layer bit stream of the selected SNR layer bit stream to the mobile terminal. - View Dependent Claims (8, 9, 10)
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11. A system for providing a video transmission service comprising:
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a server recognizing network situations and performance of a plurality of mobile terminals using state information relating to performances of respective mobile terminals received from the mobile terminals through a wireless network, comparing the state information of the mobile terminals with a predetermined threshold value, selecting a specified layer bit stream by increasing or decreasing a layer position of the bit stream for at least one layer, extracting and transmitting the selected specified layer bit stream to the mobile terminals; and the mobile terminals transmitting their own state information to the server through the wireless network. - View Dependent Claims (12)
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13. A video transmission method comprising:
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receiving state information relating to performances of respective mobile terminals from at least one mobile terminal that intends to perform a video stream service through a wireless network; selecting optimum content from a plurality of content of which sizes of images and picture qualities discriminate from one another based on the state information of the at least one mobile terminal; and transmitting a bit stream generated by extracting the bit stream from the selected content, to the mobile terminal. - View Dependent Claims (14, 15)
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Specification