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Method and system for subframe accurate synchronization

A precision, common event technology, applied in the components of the TV system, using detectable carrier information, carrier indexing/addressing/timing/synchronization and other directions, can solve problems such as subframe misalignment

Inactive Publication Date: 2009-12-16
THOMSON LICENSING SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although several existing systems exist that can manually or automatically synchronize audio and image streams using slates, these techniques often suffer from subframe misalignment caused by the sampling rate (frame rate) of the audio stream The problem

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  • Method and system for subframe accurate synchronization
  • Method and system for subframe accurate synchronization
  • Method and system for subframe accurate synchronization

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Embodiment Construction

[0016] The present invention advantageously provides a method, apparatus and system for synchronizing audio and images in applications such as movie production. Although the invention will be described primarily in the context of filmmaking, the specific embodiments of the invention should not be taken as limiting the scope of the invention. Those skilled in the art will recognize, and will appreciate from the teachings of the present invention, that the concepts of the present invention may be advantageously applied to other synchronization techniques. For example, the inventive concept may be implemented in film cutting, film recording, audio mixing, image mixing, and the like. The concept may include providing an indicator of an event in at least two modes (eg, an audio mode and a visual mode). The indicator is then recognized in time, at least for higher precision modes. At this point, the lower precision mode has a corresponding time that is extrapolated to predict when...

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Abstract

A method, apparatus and system for synchronizing between two recording modes includes identifying a common event in the two recording modes. The event in time is recognized for a higher accuracy mode of the two modes. The event is predicted in a lower accuracy mode of the two modes by determining a time when the event occurred between frames in the lower accuracy mode. The event in the higher accuracy mode is synchronized to the lower accuracy mode to provide sub-frame accuracy alignment between the two modes. In one embodiment of the invention, the common event includes the closing of a clap slate, and the two modes include audio and video recording modes.

Description

technical field [0001] The present invention relates generally to the synchronization of recording modes such as audio and image recording components, and more particularly to the synchronization of clap slates, eg in the film and television industry, with subframe precision. Background technique [0002] In film production, images (pictures) and audio are recorded by different devices. When the image and audio are combined later in processing, these two types of information must be synchronized. Typically, this is accomplished manually by the operator using the visual closing of the slate to assign the timecode to the audible "snap" of the slate. However, due to the nature of film capture, this can only be done with limited precision, since images or film are typically recorded at frame rates between 24 and 60 frames per second. Therefore, there may be a problem of 1 / 24 second or 1 / 60 second uncertainty between the visual slap and the audio. [0003] Although several exi...

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Application Information

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IPC IPC(8): G11B27/10G11B27/28H04N5/04H04N5/222H04N7/52H04N7/62
CPCH04N21/4334H04N9/802G11B27/10H04N21/4307G11B27/28H04N21/4341H04N21/2368H04N5/76H04N21/43072
Inventor 英格·托比亚斯·多塞安娜·贝莲·贝尼特斯张东庆
Owner THOMSON LICENSING SA
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