PCM
Pulse Code Modulation, a method of digitizing analog audio signals by measuring amplitude at a fixed sampling rate and quantizing it into integers of fixed bit depth, without compression.
Timeline (last 90 days)
WAV is typically used as a container for uncompressed PCM audio, but WAV itself is only a container format that can also hold other encodings internally, so a .wav extension does not necessarily mean uncompressed.
Decision rule: for work that requires editing or sentence-by-sentence verification, uncompressed PCM WAV should be used as the master; when a lossless master is determined to be needed, it should be captured directly as WAV/PCM during recording rather than converted afterwards.
When processing binary audio, the first four bytes should be checked for "RIFF" to determine whether it is already a complete WAV file, so as to avoid wrapping an already complete WAV with a second WAV header, which causes playback noise.
CDs use the PCM digital audio format with a standard specification of 16-bit/44.1kHz sampling rate and a dynamic range of approximately 96dB, jointly established by Sony and Philips in 1980 and encoded as the IEC 60908 international standard (the Red Book standard).
PCM利用硫族化合物材料在晶态和非晶态之间的相变实现不同电阻状态，具有多级存储能力强、保持特性好的优势，IBM和Intel等公司投入较多
All Facts (5)
CDs use the PCM digital audio format with a standard specification of 16-bit/44.1kHz sampling rate and a dynamic range of approximately 96dB, jointly established by Sony and Philips in 1980 and encoded as the IEC 60908 international standard (the Red Book standard).
60%UnverifiedWAV is typically used as a container for uncompressed PCM audio, but WAV itself is only a container format that can also hold other encodings internally, so a .wav extension does not necessarily mean uncompressed.
50%UnverifiedDecision rule: for work that requires editing or sentence-by-sentence verification, uncompressed PCM WAV should be used as the master; when a lossless master is determined to be needed, it should be captured directly as WAV/PCM during recording rather than converted afterwards.
50%UnverifiedWhen processing binary audio, the first four bytes should be checked for "RIFF" to determine whether it is already a complete WAV file, so as to avoid wrapping an already complete WAV with a second WAV header, which causes playback noise.
50%UnverifiedPCM利用硫族化合物材料在晶态和非晶态之间的相变实现不同电阻状态，具有多级存储能力强、保持特性好的优势，IBM和Intel等公司投入较多
50%