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    • 70. 发明授权
    • Multimedia communications system and method for providing audio on demand to subscribers
    • 用于向用户提供按需音频的多媒体通信系统和方法
    • US06985932B1
    • 2006-01-10
    • US09237099
    • 1999-01-25
    • Robert D. GlaserMark O'BrienThomas B. BoutellRandy Glen Goldberg
    • Robert D. GlaserMark O'BrienThomas B. BoutellRandy Glen Goldberg
    • G06F15/16
    • H04H20/46H04H20/28H04H20/30H04H20/40H04H20/82H04H20/83H04H60/27H04H60/51H04H60/73
    • 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.
    • 音频按需通信系统提供经由电话线或其他通信链路传送的音频数据的实时回放。 一个或多个音频服务器包括存储压缩音频数据的存储器组。 在用户PC的用户请求下,音频服务器通过通信链路将压缩的音频数据发送给用户PC。 订户PC仅使用用户PC内的CPU的处理能力,以不太实时的方式接收并解压发送的音频数据。 根据本发明的一个方面,根据无损压缩技术压缩的高质量音频数据与普通质量音频数据一起发送。 根据本发明的另一方面,用音频数据发送诸如文本,标题,静止图像等的元数据或额外数据,并且与对应的音频数据同时显示。 音频点播系统还提供指示要播放的音频剪辑中的显着划分的内容表,并允许用户立即访问列出的部门的音频数据。 根据本发明的另一方面,基于地理位置动态地分配服务器和订户PC,以在通信链路中提供最高可能的质量。