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录像资料的检验鉴定结论,在司法实践中是非常重要的证据。到目前为止,还没有一套可行的解决方案。长期以来一直采用观察、判断的方法,或提取音频进行声纹检验,既繁琐又不准确,证据说服力明显不足。笔者介绍的数字类录像资料的简易检验方法是在调研、试验的基础上,针对DV、DVCAM所拍摄的,用于法庭证据使用的录像资料中是否存在剪接进行检测而创造的实用而又直观的检验鉴定方法。时间码是摄像机在记录图像信号的时候,针对每一幅图像记录的惟一的时间编码。对记录在磁带上的每一幅画面进行编码就是时间码。在一盘磁带上,每一幅画面所对应的时间码是惟一的,记录完的磁带在进行回放的时候,其时间码的显示是无法清零的。
The verification conclusion of video data is very important evidence in judicial practice. So far, there is not a viable solution. For a long time, the methods of observation and judgment, or the audiovisual test of extracting audio frequency, have been both cumbersome and inaccurate, and the evidence of persuasion is obviously insufficient. The simple test method of the digital video data introduced by the author is based on the research and experiment, and is based on the DV and DVCAM video recording, for the use of forensic video data to detect the existence of the existence of splicing and create practical and intuitive Inspection and identification methods. The time code is the only time code recorded by the camera for each image while recording the image signal. Encoding each picture recorded on the tape is the time code. In a tape, each picture corresponds to the time code is unique, the recorded tape in the playback time, the time code display can not be cleared.