A method for measuring audio and video synchronization error of an audio/video
encoder system is provided. The method includes steps of: producing a reference
video data having a first time length and including a particular image pattern
and a reference audio data having a second time length; inputting the reference
video data and the reference audio data into the audio/video encoder system to
produce an encoded video data and an encoded audio data; processing the encoded
video data and the encoded audio data respectively to produce a detected video
data having the first time length and including the particular image pattern and
a detected audio data having the second time length; and detecting a first time
point of an audio data of the reference audio data synchronized with the particular
image pattern of the reference video data and a second time point of an audio data
of the detected audio data synchronized with the particular image pattern of the
detected video data by an analyzing tool, and calculating a difference between
the first time point and the second time point.
