search for: rolloff

Hello Is there a way to slow down or speed up the speed at which SayDigits rattles off a series of digits? Reagards

Hi, But in fact, it really affects the voice quality. One of my tester says, "Is your mouth far way from the mic?" Could you explain why we should cut 200hz below? >The notch filter is specifically designed to cut below 200 Hz when >working in narrowband. In wideband, the cutoff is more around 50 Hz. The >reason is that in narrowband operation (irrespective of the

...f lightly lossy compression like alaw/ulaw, a big low frequency waveform can push the coder into using coarse steps, so the more interesting energy in the middle of the voice band is coded with those coarse steps - i.e. poorly. Low bit rate codecs, like G.729 or speex, usually apply their own fast rolloff filter for low frequencies - e.g. G.729 rolls off its input hard, with a turnover at 140Hz - their whole coding methodology tends to break down without that. The telephone network normally rolls off hard below about 300Hz, so this actually perfectly normal voice for a phone call. A second reason...

...ole32/tests: Add a test for WM_DRAWCLIPBOARD during OleSetClipboard. Update copyright info for 2017. Alistair Leslie-Hughes (2): include: Correct misspelt GCPCLASS_PREBOUNDRTL define. include: Add LLONG_MIN, LLONG_MAX, ULLONG_MAX defines. Andrew Eikum (3): dsound: Fix rolloff factor calculation. dsound: Use the value from SetVolume when 3D processing is disabled. dsound: Don't write more than three periods to IAudioClient. André Hentschel (1): hlink/tests: Test skipped data. Henri Verbeet (4): ddraw: Keep an explicit reference to the wined3...

Dear Sebastian and all, This is a Japanese to live in Japan. I have a question. Ogg's window functon is f(x)=sin(1/2*pi*sin^2((x+0.5)/n*pi)) for 0 <= x < n But I cannot understand why this window function satisfys the equation f^2(x)+f^2(x+n/2)=2 which is for MDCT's perfect signal reconstruction. reference: Analysis/Synthesis Filter Bank Design Based on Time Domain Aliasing

...Update copyright info for 2017. Andrew Eikum (5): user32: Support IDC_PEN. dsound: Handle default case in dsound3d mode switch (Coverity). dsound: Use the value from SetVolume when 3D processing is disabled. msacm32: Support conversion from 24-bit PCM. dsound: Fix rolloff factor calculation. Austin English (1): ntoskrnl.exe: Forward RtlUnwindEx to ntdll. Brock York (1): msctf: Remove incorrect dereference of double pointer. Bruno Jesus (1): iphlpapi: Ensure GetIpAddrTable returns loopback addresses in the end. Can Taşan (3): documentation...

...ults in reconstructing (a quantized version of) the original MDCT spectrum. (this floor curve need not be generated solely from analysis of the MDCT domain data, obviously, although the current code does it this way.) The trick is that the floor curve tends to have formant-like features due to the rolloff properties of masking tones. These can be encoded into a low-order IIR LPC filter (20-30 poles, simplified direct form II. Basic speech compression stuff). Speech compressions (and, I might add, TwinVQ [VQF]) encode 20 pole systems into 20-28 bits. With a little effort, a standard algorithm lik...

...ly. secur32: Add a loop around gnutls_record_send since it may send a partial record. ws2_32: Avoid UINT32_MAX. Alistair Leslie-Hughes (1): packager: Mark DllCanUnloadNow, DllGetClassObject, DllRegisterServer, DllUnregisterServer as private. Andrew Eikum (1): dsound: Apply rolloff factor to distance attenuation. Aric Stewart (2): server: Do not replace focus and active windows with NULL on thread_attach_input. comctl32: TTM_SETTOOLINFO does not change subclassing flags. Dmitry Timoshkov (3): user32/tests: Add a test for sending inter-thread messages....