Abstract:
In distributing moving image data, it is an object to make it possible to start reproduction, not only from the head of the moving image data, but also from any desired position and to minimize an increase in the amount of the processing. A moving image data conversion device (1) comprises moving image data receiving means (2) for receiving moving image data (6), decoder configuration information saving means (3) for retrieving and holding decoder configuration information included in the moving image data (6) to define a condition for decoding the moving image data (6), decoder configuration information inserting means (4) for inserting the decoder configuration information into a plurality of predetermined positions in the moving image data (6) to generate moving image data, and moving image data output means (5) for outputting the generated moving image data as moving image data (8).
Abstract:
A media-encoded data transmission method for transmitting media-encoded data stored in a transmitted packet, using a protocol which can store the transmitted packet with an error detecting code calculated from data included in the transmitted packet, and with information for identifying a data portion used in the calculation of the error detecting code includes the steps of previously classifying each of data elements capable of composing a transmission packet into groups in accordance with the magnitude of influence exerted on the reproduction quality on the receiver side by an error associated with the data element, and determining, for each transmission packet, upon creation of each transmission packet for transmission, a data portion which includes all data elements that belong to largely affecting groups in accordance with a predetermined criterion and has the shortest data length, as a data portion for calculating the error detecting code.
Abstract:
Disclosed are an apparatus and method that make possible high-speed mode selection using an evaluation standard of high encoding efficiency in intra prediction. The apparatus includes a first cost calculator for generating cost values from difference information indicative of differences between prediction signals, which have been generated by a prediction signal generator, and a moving picture signal that is input to a moving picture compression encoding apparatus; a preliminary selector for selecting at least two prediction modes based upon the cost values and outputting these prediction modes to a second cost calculator; the second cost calculator for frequency-converting the prediction modes that have been output from the preliminary selector and generating new cost values; and a prediction mode selector for selecting the optimum prediction mode based upon the cost values prevailing after the frequency conversion.
Abstract:
A transmission side has first through Nth moving picture encoder/senders (101-1 through 101-N) for compressing moving picture frames into N encoded data and sending the encoded data. Second through Nth moving picture encoder/senders (101-2 through 101-N) compress frames encoded by the first moving picture encoder/sender 101-1 at compression ratios which are higher than that of the first encoder/sender based on interframe prediction by referring to frames at the same time as the interframe prediction performed by the first moving picture encoder/sender. Each one of reception sides selects the encoded data having the lowest compression ratio and high image quality with frame-by-frame or packet-by-packet selection from the received encoded data without error and decodes the selected encoded data.