I first read about multiband matrix decoders in a Sansui QSD-1 brochure, the QS "Type-A" decoder with the new QS ICs.
Dolby B NR uses a sliding band to extend the NR to lower frequencies depending on the content in the midrange and treble of the input signal.
I've never heard about a multiband (logic assisted) matrix decoder that dynamically changes the crossover frequencies depending on the frequency spectrum of the matrix encoded stereo input.
Although implementing this in a real time decoder may be impossible (may need some sort of lookahead function to detect when a crossover frequency should adjust), an all software decoder that could look over the entire digitized music file should be able to determine when to adjust the crossover frequencies.
Was a music dependent dynamic crossover modifying multiband decoding system considered during the development of the SM decoder?
Kirk Bayne
Dolby B NR uses a sliding band to extend the NR to lower frequencies depending on the content in the midrange and treble of the input signal.
I've never heard about a multiband (logic assisted) matrix decoder that dynamically changes the crossover frequencies depending on the frequency spectrum of the matrix encoded stereo input.
Although implementing this in a real time decoder may be impossible (may need some sort of lookahead function to detect when a crossover frequency should adjust), an all software decoder that could look over the entire digitized music file should be able to determine when to adjust the crossover frequencies.
Was a music dependent dynamic crossover modifying multiband decoding system considered during the development of the SM decoder?
Kirk Bayne
