Jpeg/mpeg decoder-compatible optimized thresholding for image and video signal compression

摘要: For encoding signals corresponding to still images or video sequences, respective standards known as JPEG and MPEG have been proposed. These are based on digital cosine transform (DCT) compression. economy of transmission, DCT coefficients may be "thresholded" prior by dropping the less significant coefficients. While maintaining compatibility, threshold selection for an image frame is optimizing minimum distortion a specified maximum target coding bit rate or, equivalently, minimized allowable constraint. In process, dynamic programming method used.