摘要:
A method for encoding images according to object shapes is provided. The method enables reduced usage of storage space when an image encoding system encodes a received image frame. The method uses a bottom-up and sequential approach for encoding coefficients. The coefficients in each subband are numbered using a tree structure, wherein level N subband is designated as a root of the whole tree, level (N−1) subbands are designated as roots of subtrees, and level (N=1) subbands are designated as terminal nodes of subtrees. The terminal nodes for one of the subtrees are numbered first, and then this subtree is numbered in the bottom-up sequence. After that, the terminal nodes for another substree are numbered, and this numbering sequence continues to number all the other subtrees until the root of the tree has been numbered, so as to allow a bottom-up encoding process for the coefficient to be performed.
摘要:
The present invention provides a medium for storing a subtitle data structure of an audio/video program and a method for displaying the same. The subtitle data structure of the audio/video program includes a plurality of character packages and a background image package, wherein each character package further has a header that includes the start and the end of a presenting time stamp (PTS), X-Y coordinates of the character, X length, Y length and a color (or colors) of the character, as well as pixel data for displaying the character. Compared with prior art, using the subtitle data structure of the present invention can considerably save the required medium capacity for storing the subtitle data.
摘要:
A system and method thereof for capturing and reconstructing a dynamic 3D ultrasound image of a blood vessel are provided. The present system includes a ultrasound transducer, a motor positioning system, an electrocardiograph, a microprocessor for processing ultrasound images and signals capturing by the ultrasound transducer, and a monitor displaying the dynamic 3D ultrasound image. The motor positioning system controls the ultrasound transducer to capture 2D ultrasound images of the blood vessel at several locations in a predetermined urea. During the capturing process, capturing times, electrocardiograms and 3D locations of those captured 2D ultrasound images are simultaneously recoded. Finally, those captured 2D ultrasound images are reconstructed to the dynamic 3D ultrasound image of the blood vessel according to the time bases based on the phases of the electrocardiograms.
摘要:
A watermark coding method and its recording medium utilize image interleaving and wavelet-based transformation to enhance the robustness of the image. The watermark series to be inserted is converted, encrypted, and modulated to increase the difficulty in decoding and restoring. Finally, the watermark is distributed and hidden in various frequency bands of the image in a frequency hopping way, generating a robust watermarked image. When used in a recording medium, side information produced during coding is recorded in the lead-in area of the recording medium to reduce the chances of illegal copying.
摘要:
A description data structure of a menu stored in an audio/video disc and a method for using the same are provided. The description data structure comprises a navigation data packet, a menu packet, and a program packet, wherein the menu packet further comprises a first header, a background image packet, a button 1 packet, a button 2 packet, etc. Moreover, each button packet comprises sub-picture information, and the navigation data packet comprises a button address packet for storing the address information of each button packet. By using the description data structure, the present invention allows not only the audio/video disc to be consumed less capacity for displaying images, but the use of a mask control program stored in the audio/video disc to be cancelled as well when highlighting a selected text in the menu, thereby expediting the processing of the stored data in the audio/video disc.
摘要:
A method for repairing video/audio files of multimedia video/audio disks is provided. The disclosed method may repair the fields with errors in the video/audio files after recording by utilizing the rewritable characteristic of rewritable optical disks. The errors caused by the video/audio instantaneous editing and recording platform may be reduced according to the disclosed method such that the repaired films may play fast forward/backward smoothly, perform Time Search function accurately, and display presentation time correctly, and are compatible to players of different specifications.
摘要:
An optical recording medium. Tracks are formed on a surface of an optical recording medium, and pits are formed in each track. Each pit is formed with at least two different widths.
摘要:
A method for establishing a connection between wireless communication devices suitable for sharing data between a sender and a receiver is provided. Both the sender and the receiver respectively have a built-in acceleration sensor to enable the sender and the receiver obtaining an internal tap-data and external tap-data. A first-connection is established between the sender and at least one receiver all around. The sender bumps the receiver both for sharing data. The sender receives the external tap-data from at least one receiver via the first-connection, the internal tap-data is compared with the external tap-data to filter out not-bumped receivers and then the bumped receiver is confirmed. Then, a second-connection is established between the bumped sender and receiver according to a security protocol so as to mutually share data through the second connection between the sender and the receiver.
摘要:
A method for repairing video/audio files of multimedia video/audio disks is provided. The disclosed method may repair the fields with errors in the video/audio files after recording by utilizing the rewritable characteristic of rewritable optical disks. The errors caused by the video/audio instantaneous editing and recording platform may be reduced according to the disclosed method such that the repaired films may play fast forward/backward smoothly, perform Time Search function accurately, and display presentation time correctly, and are compatible to players of different specifications.
摘要:
An apparatus and method for lossless audio compression/decompression through entropy coding are provided. The apparatus comprises a buffer, a time-axis predictor, and a bit-allocation entropy coder/decoder, wherein the time-axis predictor is capable of subtracting the predicted value of a current input signal value from its original value, thereby generating a predicted error signal. The predicted error signal is then input into the bit-allocation entropy decoder in accordance with a coding guideline, and in turn is coded into data blocks with different lengths. Further, the data blocks after entropy coding comprise a 32-bit header and the real data following the header, wherein the real data is substantially a discrepancy between the prediction error of the data and the minimum value of each data block.