摘要:
A method and computer program product for obtaining a main configuration file from a client electronic device upon the client electronic device being coupled to at least a portion of a media distribution system. The main configuration file defines one or more enhanced functionalities of the client electronic device. The client electronic device is coupled to the at least a portion of the media distribution system using a binary transfer protocol configured to transfer media data from the at least a portion of a media distribution system to a client electronic device.
摘要:
A media distribution system and method for storing a plurality of media data files within a media repository. A user of a client electronic device is enabled to access one or more media data files chosen from the plurality of media data files. The user of the client electronic device is enabled to manage one or more subscription accounts associated with the media distribution system.
摘要:
A system and method of the present invention cross-fade a first transmitted audio stream to a second transmitted audio stream, wherein both first and second audio streams represent the same original audio signal, but at different quality levels. A client computer receives timestamped packets of compressed encoded audio data from the first audio stream, decodes that data and resamples it to a highest sampling rate supported by playback equipment such as a sound card. A server computer responds to a change in available bandwidth, by transmitting timestamped packets of the second audio stream which correspond to a playback time earlier than that of the final transmitted packet of the first audio stream. The client computer buffers in a first buffer the decoded resampled samples from the final packets of the first audio stream, which represent a playback time period t1. The client computer then buffers in a second buffer decoded resampled samples from the initial packets of the second audio stream representing a playback time period t2. A cross-fade overlap window is defined by a time period t3 over which t1 and t2 overlap. A cross-fader cross-fades sample pairs drawn from both buffers, each pair corresponding to a playback time in the cross-fade overlap window. A cross-fade table holds a predetermined number of values decreasing from 1 to 0, which values approximate a cross-fade curve. The cross-fader applies a weight value to each sample pair, the weight value calculated by applying linear interpolation across adjacent values in the cross-fade table, by multiplying a sample from the first audio stream by the weight value, and by multiplying a time-corresponding sample from the second audio stream by one minus the weight value. The resulting contributions from both samples are combined and sent to audio reproduction equipment.
摘要:
Methods and apparatus, including computer program products, for transmitting content from a content collection site to a content monitoring site, including inserting a first digital signature into a first content segment collected by the content collection device, inserting a second digital signature, different form the first digital signature, into a second content segment collected by the content collection device sequentially after the first content segment, and transmitting the first content segment including the first digital signature and the second content segment including the second digital signature to the content monitoring site.
摘要:
A method, computer program product and computing device for registering a user with a media distribution system to obtain a subscription to the media distribution system, the subscription providing the user with content rights that allow the user to obtain and render media content licensed by the media distribution system. A personal media device is registered with the media distribution system for use by the user to obtain and render the media content. At least a portion of the media content is rendered on the personal media device.
摘要:
A method, computer program product and computing device for associating at least one historical event with at least one media content event based, at least in part, upon a chronological relationship. A chronological representation of the at least one historical event and the at least one media content event is displayed within a window of time. A user selection of an informational item displayed within the chronological representation is received, and the chronological representation is updated based on the selected informational item.
摘要:
Additional version or versions of a media content is pre-generated on a first client device, after downloading the media content onto the first client device, but prior to the first client device receiving a request to provide the media content to a second client device.
摘要:
A method for generating a digital motion video sequence at a plurality of bit rates uses a transitional coding source when switching between bitstreams having different bit rates during transmission of a video sequence. The transitional data may be frames coded using reconstructed frames reconstructed for a first bitstream using the characteristics of the second bitstream. These “low bit rate insert frames,” or LBIFs, contain the image characteristics of a signal coded at the lower bit rate. With a bitstream having a higher bit rate being periodically coded using an LBIF, a point of image continuity between the two bitstreams is provided. Thus, switching from one bitstream to the other at this point in the video sequence minimizes the production of artifacts caused by differences in bit rate. In another embodiment of the invention, a separate set of transitional data is created, taking the form of “switch” frames, or S-frames. The S-frames are typically the difference between a frame of a first bitstream and a frame of a second bitstream. These frames are inserted into the decoded bitstream during the transition from one bitstream to the other, and compensate for any visual artifacts that might otherwise occur due to the difference in bit rate of the two bitstreams.
摘要:
An audio-on-demand communication system provides real-time playback of audio data transferred via telephone lines or other communication links. One or more audio servers include memory banks which store compressed audio data. At the request of a user at a subscriber PC, an audio server transmits the compressed audio data over the communication link to the subscriber PC. The subscriber PC receives and decompresses the transmitted audio data in less than real-time using only the processing power of the CPU within the subscriber PC. According to one aspect of the present invention, high quality audio data compressed according to lossless compression techniques is transmitted together with normal quality audio data. According to another aspect of the present invention, metadata, or extra data, such as text, captions, still images, etc., is transmitted with audio data and is simultaneously displayed with corresponding audio data. The audio-on-demand system also provides a table of contents indicating significant divisions in the audio clip to be played and allows the user immediate access to audio data at the listed divisions. According to a further aspect of the present invention, servers and subscriber PCs are dynamically allocated based upon geographic location to provide the highest possible quality in the communication link.
摘要:
Content is streamed from a providing device to a receiving device, where the content is successively buffered in a receiving buffer, and then successively removed for processing. Periodically, the likelihood of the receiving buffer becoming empty or reaching an unacceptable low threshold is assessed, and the streaming rate is adapted based on the result of the determination. In one embodiment, a probability is computed, modeling the packet arrival into the receiving buffer and removal as Markovian input and output processes respectively, and the receiving buffer as a single channel queue. In one embodiment, the likelihood is determined by the content providing device, based at least in part on feedback information from the content receiving device, and the streaming rate is stochastically adapted accordingly.