• ????(51)
  • ???(33)
  • ??(16)
  • ????(2)
  • ??
  • ???
  • ??
  • ??? ?
  • ???
  • ???? ??

?????

DM ???? Nyquist ?? dsp ???????? ?? ?? ???????? ???/ ????

"adaptive quantization" ???? 21-40 / 51?

??? ??? ????? ???? ????.
  • ?? ??
    ???? ?????(Unit10-ex2)
    ??? ????? ??? ??? ??? ??? ???? ?? ????. ??? ??? ??? ?? ??? ??? ??? ??? ? ?? ???? Adaptive Delta ... ? Clock frequency? ??? ??? ???? ??. ??? granular noise? Quantization intervals? ??? ??????? ??? ? ? ... ?. ??? slope overload? Quantization intervals? ??? ??????? ???? ? ? ??. ???, a Linear Delta
    ??? | 17??? | 2,000? | ??? 2013.12.19
    ???? ????
  • ??? ?? ?? ??
    Nyquist ??? ?? ?? ??, ???? ???? ??? ??? ?? ??, ???? ???? ??? ???? ??? ? ???? ? ??? ???? ? ??? ?? ??.
    (Digital-to-Analog Converter)? ????.???? ???? ??? ??? ???(Sampling), ???(Quantizing), ???(Coding)? ??? ?? ... ? ??.(1) ???(Sampling)???? ?? ??? ???(Sampling), ???(Quantizing), ???(Coding)? ??? ??? ??.???? ??? ??? ... ? ????.(a) ???? ?? (b) ???? ?? ????? ??-???? ???? ???-(2) ???(Quantizing)??? ??? ??? ? ?? ??? ???? ??
    ??? | 3??? | 3,000? | ??? 2013.04.10 | ??? 2021.06.02
    ???? ????
  • ?? ??
    ?????? ?? ? ?? ???? ?? ??
    ????? ?? q?, V? ?? ????? ¡°q = V/(2B?1)¡±??:?B= 1?B = 8?B = 16?????(quantization error)???? ? ??? Y? ? ... -> 17-20-23|?? ?? ?? ?: 3|DPCM ?: 17, 3, 3 ----- ?? ?? ???ADPCM (Adaptive DPCM)??? ?? ???? Bit?? ?? ... ? ???.???? ?? ??? ???? ?? ? ??? ??? ? ?? ?? ? ??.??????(Sampling) : 44.1 Khz????(Quantization) : 16
    ???? | 20??? | 1,500? | ??? 2016.05.06 | ??? 2016.05.10
    ???? ????
  • ?? ??
    ??10(??)
    Unit 10. Delta Modulation (DM)¡ö New terms and words- Adaptive Delta Modulation(ADM) : ??? ??? ?? ... ?? ??? noise. PCM??? quantization? ????.- Linear Delta Modulation(LDM) : quantization interval? ?? ... ? tracking ? ? ????. ??? quantization interval? ?? ?? message signal? ?? ?? ??? detect ? ? ?? granular noise? ??? ??.
    ??? | 3??? | 1,000? | ??? 2012.01.02
    ???? ????
  • ?? ??
    ???? ??9
    , quantization interval? ???? quantization noise?? ???? ?? ? ? ??.Unit 10 _ Exercise 2An Adaptive Delta ... , the quantizer used in PCM systems can be replaced byc. an integrator.5. Increasing the slope of the??.
    ??? | 14??? | 2,000? | ??? 2012.12.23 | ??? 2014.01.01
    ???? ????
  • ?? ??
    ???? ???? ???
    ??? ? f(nT)? ??? ??? ? ??? ??? ??.??3. DPCM ??? ???2. ADM(Adaptive Delta Modulation)????(Delta ... -??? ??? ITU-T ???? ????.3. G.721 ADPCM(Adaptive Delta PCM)ADPCM(Adaptive Delta Pulse Code Modulation ... Pulse - Multi level Quantization)6.3kbps? G.721?? ??? ??. 5.3kbps ACELP ??? ??? ??? ????. H.324??
    ??? | 13??? | 3,000? | ??? 2013.12.19
    ???? ????
  • ?? ??
    ????
    Sampling - Quantization The Digital Recording process Reproduction Process Digital transmission standards ... . 1 MHz channel spacing, with frequency hopping ? c. Adaptive Frequency Hopping, for co-existence with ... ) ^ Quantization (which represents the signal-level component)Sampling An analog signal A digital sign
    ??? | 41??? | 2,000? | ??? 2012.02.15
    ???? ????
  • ?? ??
    Sampling Theory ??? ??
    ? ??? (Adaptive Quantizing)- ?? ?? ??? ?? ??? ??? ??, ?? ?? ????? ???? ???? ADPCM ?? ???? ??? (Fixed ... ? Quantizing, Quantization ???? ????, ????? ?? ???? ????? ??? ?? ????? ????, ???? ??? ???? ?????? ??? ??? ... Quantizing ?? Uniform Quantizing)- ??? ???? ?? ?? ??? ???? ??.- ?????(????) ??? ??? ?? ?? ???.? ??? (Non
    ??? | 3??? | 1,000? | ??? 2010.04.07
    ???? ????
  • ?? ??
    ??? ??
    Modulation) ??- ???? ??? ???? ???? ???(sampling), ???(quantization)? ?? ??? ??? ???? ?? ???? ??- ?? 6.3 ... ?- ???? ??? ??? ??? ??2) ADPCM(Adaptive Differential PCM)- ADPCM? DPCM?? ???? ??? ??? ??? ???? ?? ?? ?? ??? ???(adaptive)?? ????? ??? ??
    ??? | 3??? | 1,000? | ??? 2010.12.04
    ???? ????
  • ?? ??
    ???(????)? ??? DM, ADM ??
    Adaptive Delta Modulation Exp.1. Simulink Map2. Block parameters and explanations(1) Zero-Order ... Hold(2) Sampled Quantizer Encode(1) Sampling? ???? Zero-Order Hold?? Sample time? Ts?? ??? ???.(2 ... ) Quantization partition? 0?? ????, ?? ????? 0?? ??. Quantization codebook? ??? output? ??? ??? ?? ??
    ??? | 5??? | 2,000? | ??? 2008.03.23
    ???? ????
  • ?? ??
    SIMULINK???????????
    ?.?? ????(adaptive equalization)-????? ????? ??? ??-??? ????? ?? ?? ??? ?? ?? ????? ???? ???? ??-?? ?? ... )Parameteramplitude : 5frequency : 50*2*piZero-Order Hold (sampling)ParameterSample Time : 1/6000Quantizer ... and hold?? Pulse ??? ??? Sine Wave? Sampling??. ? ? SQ Encoder?? ?? 4-level? Quantization??, ??
    ??? | 17??? | 5,000? | ??? 2009.08.12 | ??? 2015.07.13
    ???? ????
  • ?? ??
    [????][????]????(????) ??, ????(????) ??, ????(????)? ?????, ????(????)? ???, ????(????) ????, ????(????)? ?? ?? ??
    Audio Coder : AT&T/Lucent), ATRAC(Adaptive Transform Acoustic Coding : Sony), TwinVQ(TransformDomain ... Weighted Interleave Vector Quantization:NTT), Qdesign Music Format(Apple), MS Audio(Microsoft)???.?
    ??? | 8??? | 5,000? | ??? 2011.06.23
    ???? ????
  • ?? ??
    QCELP, EVRC, AMR, AMR-WB, QPSK, OQPSK ??, ??
    EVRC? ??? LSP? Split Vector Quantization ?RCELP? ?? ??? ???? 13 Kbps QCELP?? ???, ???? 8 kbps?13 kbps ... ???.?G.722.2? ??? ??? ¡°Wideband coding of speech at around 16kbit/susing adaptive multi-rate wideband
    ??? | 13??? | 1,000? | ??? 2010.10.26
    ???? ????
  • ?? ??
    [??] PCM ? ?? ??? ?? ????
    ? 8,000? ??)? ????? ??.2. ??? (quantization)???? ?? ?? PAM??? ?????? ?? ????? ???(?? ??? ???)? ??? ?? ... ?? ?? ???(quantization)? ??. ??? ??? ?? 1-3? ??? ??? ???? ? ? ??? ??? 0? +1??? PAM ??? ¡®0¡¯?? ?????? ... ), APCM(Adaptive PCM), DPCM(Difference PCM), ADPCM(Adaptive Difference PCM) ?? ??.???? ?? ???? ??? ??
    ??? | 9??? | 1,000? | ??? 2008.02.21
    ???? ????
  • ?? ??
    ??? ???, ???? ?? ??
    ? ?? ???? ??.2???(Quantizing)????? ???? ??? ?? ?? ?? ???? ? ???? ?????, ???? ? ?? ??? ???? ??? ??? ... ?? ????.?.??? ??(quantization noise): ??? ??? ???? ??? ??? ???? ?? ??? ?? ?? ??? ???? ??? ??? ????.?.?? ... ??? ?? ??? ?? ??? ?????? ????? ??? ????? ??- ??? ??? ?? ? ??.c. ADPCM(Adaptive PCM)??? ???? ??? ??, DPCM
    ??? | 8??? | 1,500? | ??? 2007.03.11
    ???? ????
  • ?? ??
    [??????]??????
    ? ???.* ???(Quantization): ??????? ???? ??? ???Scaling?? (???) ??? ???.??: ??????? A/D ??? chip? ????. ... , ????: ????? (Multi-processing)???? (Adaptive processing)????? (Non-linear processing)?????? ?????
    ??? | 15??? | 1,000? | ??? 2010.06.07
    ???? ????
  • ?? ??
    [????]??(Modulation)
    (Sampling)4) ??? (Á¿×Ó»¯£¬Quantization)5) ??? (Encoding)6) ?? ??7) ?? (FDM? ? ?)8) PCM? ??1. ??? ???? ... ?? ()¡£DPCM(Differential PCM)data??? ??DM(delta Modulation)¡ý ??????? ¡ý ??/???? ??¡£ADPCM (Adaptive ... DPCM) ADM (Adaptive Modulation)4) Digital Translation?. ??¡£Digital data? ??? ??? ?? Digital Signal? ??
    ??? | 9??? | 2,000? | ??? 2007.07.07
    ???? ????
  • ?? ??
    ????? ?? ??
    . ?? ?? ????? ?? ??? ?? ??? ADPCM(Adaptive Differential Pulse Code Modulation) ???? ???? ??.????? ????? ... (Discrete Cosine Transform) ??? ?? ???? ??.(3) ??? (Quantization)? ??? ?? DPCM?? DCT??? ??? ?? ?? ?
    ??? | 12??? | 1,000? | ??? 2008.08.13 | ??? 2016.08.09
    ???? ????
  • ?? ??
    ????? ???
    ? ??? ???? ???? ?? ? ??? ?? ???? ?? 2? ???? ??? ?? ??.2. ???(quantizing) : ???? ??? ??? ??? ?? ? ??? ... . ADPCM(Adaptive Differential Pulse Coded Modulation) :DPCM???? ??¡ù DPCM ?? : ?? ? ???? ??? ???? ?? ??? ? ??
    ??? | 12??? | 1,000? | ??? 2007.11.18
    ???? ????
  • ?? ??
    [??? ??] ????? ?? ??
    .? ADPCM (Adaptive Differential Pulse Code Modulation :?? ?? ?? ????)ADM ??? ????? ?? ??? ????? ????? ?? ... ??? ? 24Kbps)[ADPCM ??? ???]{DPCM? ????? ?? ????/?????(Quantizer / Coder)? ???(Predictor)? ? ?
    ??? | 3??? | 1,000? | ??? 2004.06.01
    ???? ????
?? AI ??? ????
???? ???? ??????.
2025? 06? 09? ???
AI ??
?????. ????? AI ?????. ??? ???????
7:24 ??
?? ??? ????? EasyAI
?????. ?????? ??? ?? ??? ???? ???? ??? ????? EasyAI ???.
?? ??? ?? ??? ??????.
- ??? ???? ???? ?????? ?? ??? ????.
- ??? ???? ?? ??? ??? ????.
- ????? ?? ??? ???? 1? ?? ?? ? ????. ?? ?? ??? ???!
?? ???? ??? ???.
- ???? ??? ????? ??? ??
- ???? ??? ??? ??? ???? ??? ??? ??? ???? ????, ???????? ???? ??? ??? ???? ??? ???? ?????
- ???? ???
¡°EasyAI ? ??? ?? ??? ???? ?? ? ????"