Patent ID: 8249167

Claim:
A PVR (Personal Video Recorder)-support video decoding system of a digital television receiver having a HDD (hard disk drive), comprising: a first TS (Transport Stream) decoder configured to decode a PVR input signal outputted from the HDD and output the decoded video data; a second TS decoder configured to select one of the plurality of channel signals, decode video data from the TS bitstreams of a selected signal, and output the decoded video data along with the TS bitstreams; a decoder configured to variable-length-decode the decoded video data outputted from at least one of the first and second TS decoders, and restore the video data to pixel values of an original picture through an Inverse Quantization (IQ) process, an Inverse Discrete Cosine Transport (IDCT) process, and a Motion Compensation (MC) process; a video decoder configured to analyze characteristics of video data based on error information, header information, and macroblock information extracted from the decoded video data to generate analysis information, wherein the characteristics of video data are used to support fast forward, reverse play, and generation of a thumbnail image; a first engine configured to generate meta data information based on the generated analysis information, encode the input TS bitstreams, and control to store the generated meta data information and the encoded input TS bitstreams, wherein the meta data information is associated with storing the input TS bitstreams in a non-transitory storage medium; and a second engine configured to control to search the stored input TS bitstreams in the non-transitory storage medium according to the stored meta data information and decode the searched input TS bitstreams; wherein the video decoder is configured to extract at least one of a representative DC value of luminance blocks, an average DC value of luminance blocks, and a DC value of chrominance blocks from the decoded video data; and to process a DC image of an I-picture in a form of a frame difference between two successive I-pictures, a thumbnail image, and a DC histogram of luminance or chrominance.