Synchronisation of audio and video playback
申请(专利)号： GB20140008190
专利号： GB2525914B 主分类号： G11B31/00
申请权利人： MEWT LIMITED 公开国代码： GB 优先权国家： GB
摘 要：
There is provided a method of playing audio content of an audio-visual
presentation to a viewer of video content of the audio-visual presentation in
synchronisation with the video content, wherein playback of the audio content is synchronised with the displayed video content based on at least one ultrasonic synchronisation signal (400) received during display of the video content. The method comprises receiving and digitising an ultrasonic signal comprising the at least one ultrasonic synchronisation signal (400), the at least one ultrasonic synchronisation signal encoding a
respective timecode through modulation of one or more ultrasonic carrier signals (410-1 to 410-8), wherein a first ultrasonic carrier signal which has been amplitude modulated to encode a logical \logical \carrying segments (412) of the amplitude modulated first ultrasonic carrier signal is received and digitised. Each of the data
申请日： 2014-05-08 公开公告日： 2018-07-18
分类号： G11B31/00;
G11B27/10; H04B11/00; H04N21/43 发明设计人： ROSS BURRIDGE;
GLYN WILLIAMS 申请国代码： GB
优先权： 20140508 GB
201408190
摘 要 附 图：
carrying segments (412) is followed by a non-data-carrying segment (414), in
which the amplitude of the first ultrasonic carrier signal does not exceed a predetermined threshold. A digitised ultrasonic synchronisation signal in the digitised ultrasonic signal is identified, and the identified digitised ultrasonic synchronisation signal is decoded to
determine the corresponding timecode by processing the digitised ultrasonic
synchronisation signal to identify the data-carrying segments (412), and extracting the corresponding timecode from the
identified data-carrying segments (412). A playback point in the stored audio content is then determined based on the determined timecode, and the stored
audio content is played to the viewer from the determined playback point such that the audio content is played in
synchronisation with the displayed video content. 主权项：
权 利 要 求 说 明 书
【Synchronisation of audio and video playback】的权利说明书内容是......请下载后查看
Synchronisation of audio and video playback
