Lines Matching full:phase
166 'point stereo', 'phase stereo' and subcategories of each.</em></p>
330 <h3>Phase Stereo</h3>
332 <p>Phase stereo is the least aggressive means of gracefully dropping
335 <p>It's often quoted that the human ear is deaf to signal phase above
338 between high frequency in-phase and out-of-phase noise. Obviously
343 <p>'Phase stereo' is simply a more aggressive quantization of the polar
346 phase with respect to the magnitude. The phases of high amplitude
348 relatively rare and L/R tend to be in phase, so there is generally
351 <h4>example: eight phase stereo</h4>
353 <p>Vorbis may implement phase stereo coupling by preserving the entirety
357 or negative, this results in left and right phase having eight
358 possible permutation, thus 'eight phase stereo':</p>
360 <p><img src="eightphase.png" alt="eight phase"/></p>
362 <p>Left and right may be in phase (positive or negative), the most common
363 case by far, or out of phase by 90 or 180 degrees.</p>
365 <h4>example: four phase stereo</h4>
367 <p>Similarly, four phase stereo takes the quantization one step further;
368 it allows only in-phase and 180 degree out-out-phase signals:</p>
370 <p><img src="fourphase.png" alt="four phase"/></p>
374 <p>Point stereo eliminates the possibility of out-of-phase signal
393 higher frequencies, lower amplitudes or 'nearly' in-phase sound.</p>
401 constructed out of lossless and point stereo. Phase stereo was used
