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What is the difference between sample rate and frame rate? I tried to check a song and found sample rate and frame rate using java.They have same value, It makes me confuse.
doesn't frame consist of many sample?
thank you
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For PCM, A-law and μ-law data, a frame is all data that belongs to one sampling intervall. This means that the frame rate is the same as the sample rate.
Sample rate is the frequency at which snapshots of an analog signal are recorded. Thus the more snapshots per second, the higher the sample rate and the better the quality. With that being said, there is a limit of a “practical” sample rate.
A frame consists of exactly one sample per channel. If there is only one channel (Mono sound) a frame is simply a single sample. If the sound is stereo, each frame consists of two samples, etc. is 8 bits, and we're handling mono sound, the frame size is one byte.
Frame rate applies to picture, not audio. Audio is measured by sample rate (typically 44.1 or 48kHz), bit depth (typically 16 or 24), and bit rate (96–320kbits/sec for mp3).
read the documentation
Sample rate = number of samples / second
Frame = 1 sample from each channel (PCM)
Frame Size = Sample size * Channels
Frame Rate = frames / second.
For PCM the sample rate and the frame rate are the same since a frame consists of a a sample from each channel
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From: http://www.jsresources.org/faq_audio.html#frame_rate
For PCM, A-law and μ-law data, a frame is all data that belongs to one sampling intervall. This means that the frame rate is the same as the sample rate.
For compressed formats like Ogg Vorbis, mp3 and GSM 06.10, the situation is different. A frame is a block of data as it is output by the encoder. Often, these blocks contain the information for several sampling intervalls. For instance, a mp3 frame represents about 24 ms. So the frame rate is about 40 Hz. However, the sample rate of the original is preserved even inside the frames and is correctly restored after decoding.
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