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De-Emphasis [Analog Devices Wiki]
https://wiki.analog.com/resources/tools-software/sigmastudio/toolbox/filters/deemphasis
The De-Emphasis filter is pre-configured, with set parameters, and is used to attenuate the high-frequency components boosted during recording with pre-emphasis. When the De-Emphasis block is used on audio recorded with pre-emphasis, its signal-to-noise ratio is greatly improved.
Why does an audio DAC possess deemphasis hardware ...
https://electronics.stackexchange.com/questions/249441/why-does-an-audio-dac-possess-deemphasis-hardware
\$\begingroup\$ Do you understand what de-emphasis is in audio context? It's not clear if the question is about why do de-emphasis at all, or about how it's implemented in this chip. \$\endgroup\$ – Olin Lathrop. Aug 3 '16 at 10:53 ... Designing audio player - low-pass filter, DAC. 1.
De-Emphasis Response Table (75us, 25us, J-17) - FM Systems
https://www.fmsystems-inc.com/de-emphasis-response-table-75us-25us-j-17/
In the receiver, De-emphasis is used after demodulation to recover a flat audio frequency response. This results in a much improved Signal-to-Noise Ratio for any given FM transmission system. The standard in the USA for FM Radio is 75 microseconds.
Tape Saturation and Pre/De-emphasis filters - KVR Audio
https://www.kvraudio.com/forum/viewtopic.php?t=318629
de/emphasis is just taking into account that the response of the system is non-linear with respect to frequency and attempting to compensate for that by "leveling" the frequency response. you apply the inverse of the "bad" response at the input, so when you are "inside" the system the response becomes linear. (or as desired)
Stereo Lab - CD de-emphasis - Pspatial Audio
http://pspatialaudio.com/cd_deemp.htm
And the de-emphasis in the player further reduced the audibility of the remaining quantisation errors by attenuating the high frequencies where they are most easy heard. The presence of emphasis was signalled by a dedicated control bit in the recorded bitstream which the CD player detected and switched in the de-emphasis filter as required.
Pre-emphasis and De-emphasis - D&E Notes
https://www.daenotes.com/electronics/communication-system/pre-emphasis-and-de-emphasis
To return the frequency response to its normal level, a de-emphasis circuit is used at the receiver. This is a simple low-pass filter with a constant of 75 πs. See figure (c). It features a cutoff of 2122 Hz and causes signals above this frequency to be attenuated at the rate of 6bB per octave. The response curve is shown in Fig (d).
De-emphasis components - Hydrogenaudio
https://hydrogenaud.io/index.php?topic=99394.0
De-emphasis components. 2013-02-10 21:58:35. Plugins to do de-emphasis of pre-emphasized CDs: * Postprocessing (foo_deemph): works only with lossless sources; always active during playback and ReplayGain scan. * DSP plugin (foo_dsp_deemph): works with any source. * To de-emphasize a track, add a tag named PRE_EMPHASIS or PRE-EMPHASIS with a ...
FM Audio Understanding (Pre-emphasis, De-emphasis …
https://forums.qrz.com/index.php?threads/fm-audio-understanding-pre-emphasis-de-emphasis-and-flat.665484/
If my understanding is correct, each repeater and the controller should be configured to pass “flat” audio and basically allow the user in the field to handle the pre-emphasis and de-emphasis. Could someone tell me if my understanding is correct and if how I have sketched my audio block is correct? Click to expand...
De Emphasis ~ what's that all about? - 2 Channel - HiFi …
https://www.hifiwigwam.com/forum/topic/41626-de-emphasis-~-whats-that-all-about/
De-emphasis means that the treble is rolled off on playback, to match the boost on record. It's exactly the same principle as is used in RIAA equalisation where the treble is boosted by 20dB, the bass cut by 20dB on the LP, and the reverse is done by the RIAA equalisation in the phono pre-amp.
[email protected] | SDR# "Filter Audio" setting and FM de ...
https://groups.io/g/airspy/topic/sdr_filter_audio_setting/75729908?20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,75729908
So the deemphasis filter makes the audio through the system flat and reduces the native noise from an FM signal. The CTCSS filter is a totally different monster usually fairly sharp at around 200 Hz. CTCSS tones would otherwise be …
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