Abstract: Provided are an image processing apparatus and an image processing method. The image processing method includes: obtaining a reference block a having a first resolution and a differential block having the first resolution; transforming a resolution of a prediction block having the first resolution and a resolution of the differential block having the first resolution in order to generate a prediction block having a second resolution and a differential block having the second resolution, the prediction block having the first resolution and the differential block having the first resolution being generated based on a pixel value of the reference block having the first resolution; and synthesizing the generated prediction block having the second resolution and the generated differential block having the second resolution in order to generate a target block having the second resolution.

Abstract: Disclosed is an apparatus and method for estimating a channel capacity of an end-to-end terminal. The channel capacity estimating method of the end-to-end terminal includes calculating an average value of channel capacities for each size of data packets, the data packets varying in size, measuring an actual channel capacity with respect to the data packets, and deriving a linear model of a channel capacity based on the size of the data packets using the average value of the channel capacities and the actual channel capacity.

Abstract: An image intra prediction method and image intra prediction apparatus and a decoding apparatus and a decoding method using the image intra prediction method are provided. The image intra prediction method includes: backing up boundary pixel values adjacent to a block that is to be decoded; correcting the boundary pixel values adjacent to the block that is to be decoded based on correlations between the boundary pixels and pixels adjacent to the boundary pixels; predicting a block that is to be decoded according to an intra mode, from among a plurality of intra modes, based on the corrected boundary pixel values; and restoring the boundary pixel values from the backed-up values.

Abstract: Provided are an image processing apparatus and an image processing method. The image processing method includes: obtaining a reference block a having a first resolution and a differential block having the first resolution; transforming a resolution of a prediction block having the first resolution and a resolution of the differential block having the first resolution in order to generate a prediction block having a second resolution and a differential block having the second resolution, the prediction block having the first resolution and the differential block having the first resolution being generated based on a pixel value of the reference block having the first resolution; and synthesizing the generated prediction block having the second resolution and the generated differential block having the second resolution in order to generate a target block having the second resolution.

Abstract: Disclosed is a buffer controlling apparatus and method using a play time during image transmission. The buffer controlling method using the play time during the image transmission includes controlling a transmission bit rate with respect to packets to be transmitted to a reception buffer based on bit capacity with respect to packets of the reception buffer, controlling a number of transmission frames with respect to the packets to be transmitted to the reception buffer based on a play time with respect to the packets of the reception buffer, and generating the packets to be transmitted corresponding to the transmission bit rate and the number of the transmission frames, and transmitting the generated packets to the reception buffer.

Abstract: Disclosed is an apparatus and method for estimating a channel capacity of an end-to-end terminal. The channel capacity estimating method of the end-to-end terminal includes calculating an average value of channel capacities for each size of data packets, the data packets varying in size, measuring an actual channel capacity with respect to the data packets, and deriving a linear model of a channel capacity based on the size of the data packets using the average value of the channel capacities and the actual channel capacity.

Abstract: In a wireless communication system provided with a WAP (wireless application protocol) server which can convert different data and protocols into available data and protocols between the wireless communication system and an Internet server, a method of designating a WAP server address and a wireless communication system are disclosed.