Abstract: An apparatus and method of simultaneously playing multiple channel images are provided. The apparatus for simultaneously playing multiple channel images includes a frequency changeover tuner successively selecting multiple channels, a demodulation unit demodulating data of the selected channels, a storage unit storing the demodulated data, a playback unit playing the stored data by channels, and an image-management unit managing an arrangement of displayed channel images.

Abstract: A method and apparatus for changing a channel in a digital broadcasting receiver and for hiding a delay that occurs due to the change of the channel are provided. The method includes receiving broadcasting data of at least one channel except for a current channel by using a time division method, based on a pre-set schedule; storing the received broadcasting data; and when a control signal for changing a channel is input, outputting broadcasting contents of the changed channel, which corresponds to the control signal, to the display device by using the stored broadcasting data.

Abstract: An efficient method of motion estimation is provided. The method includes receiving a plurality of macroblocks in a reference frame, wherein the plurality of macroblocks are used for motion estimation related to a current frame, and performing the motion estimation for a plurality of macroblocks in the current frame by using the received plurality of macroblocks in the reference frame.

Abstract: A video encoding apparatus and method to distribute one or more macroblocks, classified into the same slice group, over an entire frame, according to the H.264 standard.

Abstract: Provided are a video watermarking method and apparatus and a video content protecting method and apparatus using video watermarking. The method includes detecting scene transition in a video sequence, calculating an image complexity in a scene using one or more frames included in the scene and determining a watermark embedding strength for the scene, and embedding a watermark into the video sequence according to the watermark embedding strength.

Abstract: A transcoding system and method effectively synchronize segmentation metadata with A/V content when converting an MPEG stream to another format stream using a segment browser. The transcoding system includes a timing synchronizer, which adjusts the timing parameters so that the video data can be synchronized with segmentation metadata even after the transcoding process, a transcoding condition determiner, which determines transcoding conditions suitable for an end user environment, and an encoder, which compresses a video sequence reconstructed from the video data according to the transcoding conditions determined by the transcoding condition determiner and records a presentation time stamp, which is one of the adjusted timing parameters, in the compressed video sequence.