Electronics and Telecommunications Research Institute

Bumho Kim

Jinwuk Seok

Jeong-Woo Lee

Pyeong Soo Mah

Yeon Jeong Jeong

Jung Soo Lee

Kisong Yoon

Yong Ki Son

Seon Tae Kim

Hyung Kook Jun

Provided are an apparatus and method for generating digital cinema content and an apparatus and method for playing digital cinema content. The method of playing digital cinema content using a digital cinema package (DCP) including frame data having a first resolution and length information about frame data having a second resolution lower than the first resolution, and a key delivery message (KDM) includes obtaining a material exchange format (MXF) file and a decryption key by parsing the DCP and the KDM, extracting an encrypted triplet from the MXF file, extracting the length information about the second-resolution frame data using the encrypted triplet and the decryption key, decrypting an amount of data required to decrypt the second-resolution frame data in the first-resolution frame data using the length information about the second-resolution frame data, and decoding the decrypted second-resolution frame data.

Apparatus and method for generating digital cinema content and apparatus and method for playing digital cinema content

A rate control method per block for a video encoder, includes estimating an average bit rate of a block; and determining a variation of a quantization coefficient such that an objective function based on the difference between an objective bit rate and the estimated average bit rate is minimized.

Rate control method for video encoder using Kalman filter and FIR filter

The present invention relates to a half-pel motion estimation method. The calculation object half-pel, which is in the block of the previous or next reference frame, is not estimated additionally for each block of the current frame divided into blocks of a predetermined size. The present invention suggests an algorithm that can perform half-pel search only with a SAD value used in integer-pel search and a random variable for correcting errors. Since the present invention does not have to generate half-pel for motion estimation, the calculation amount is amazingly reduced and the calculation time is reduced.

Fast half-pel searching method on the basis of SAD values according to integer-pel search and random variable corresponding to each macro block

A method of estimating motion in a mobile device reduces access of external memory and power consumption while increasing the usability of internal memory. The method includes recognizing an overlapped block of a reference search area between the current and its next macro block, and transferring only non-overlapped blocks to internal memory when motion estimation of a next macro block is performed.

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Daejeon, South Korea

Bumho Kim