XGpublishing

Audio in alta definizione

L'audio in alta definizione rappresenta la più innovativa frontiera dell'HD. Nell'era dell'alta definizione, la qualità del CD non è infatti sufficiente per fruire un'esperienza sensoriale di livello.

8,000 Hz Fine for human speech (but loses sibilance) e.g. phones, wireless microphones etc.
11,025 Hz 25% of the sample rate of audio CDs e.g. lower-quality PCM, MPEG audio and subwoofer bandpass audio analysis.
22,050 Hz 50% of the sample rate of audio CDs e.g. lower-quality PCM, MPEG audio and for low frequency energy audio analysis.
32,000 Hz Used for miniDV digital video camcorders, video tapes with additional audio channels, NICAM digital audio, high-quality digital wireless microphones. DAT (LP mode) and Digitales Satellitenradio (German),
44,056 Hz PCM adaptor using NTSC video tapes (245 lines x 3 samples x 59.94 frames/sec),
44,100 Hz Used with MPEG-1 audio (VCD, SVCD, MP3) and audio CD, adopted from the PCM adaptor using PAL video tapes (588 lines x 3 samples x 25 frames/sec). Most professional audio equipment uses (or can select) 44.1 kHz sampling.
47,250 Hz The world's first commercial PCM sound recorder by Nippon Columbia
48,000 Hz Digital sound used for DVD, miniDV, digital TV and films. Most professional audio equipment uses (or can select) 48 kHz sampling.
50,000 Hz Digital audio recorders 3M and Soundstream (in the late 70s)
50,400 Hz Used by the Mitsubishi X-80 digital audio recorder
88,200 Hz Used by professional recording equipment for CD.
96,000 Hz DVD-Audio, BD-ROM (Blu-ray Disc) audio tracks. Some professional audio equipment uses (or can select) 96 kHz sampling.
176,400 Hz Used by professional recording equipment for CD
192,000 Hz DVD-Audio, BD-ROM (Blu-ray Disc) audio tracks, High-Definition audio recording devices and audio editing software
2,822,400 Hz SACD, 1-bit sigma-delta modulation process known as Direct Stream Digital, co-developed by Sony and Philips