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CODAGE MIC [2 records]
Record 1 - internal organization data 1995-03-06
Record 1, English
Record 1, Subject field(s)
- Computer Graphics
- Codes (Software)
Record 1, Main entry term, English
- differential pulse-coded modulation coding
1, record 1, English, differential%20pulse%2Dcoded%20modulation%20coding
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- DPCM coding 1, record 1, English, DPCM%20coding
correct
- differential PCM coding 2, record 1, English, differential%20PCM%20coding
correct, proposal, see observation
Record 1, Textual support, English
Record number: 1, Textual support number: 1 OBS
DPCM. The simplest form of predictive compression operates at the pixel level with a technique called differential PCM (DPCM). In DPCM, we compare adjacent pixels and then transmit only the difference between them. Because adjacent pixels often are similar, the difference values have a high probability of being small and they can safely be transmitted with fewer bits than it would take to send a whole new pixel. 3, record 1, English, - differential%20pulse%2Dcoded%20modulation%20coding
Record 1, French
Record 1, Domaine(s)
- Infographie
- Codes (Logiciels)
Record 1, Main entry term, French
- codage DPCM
1, record 1, French, codage%20DPCM
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- codage Delta PCM 1, record 1, French, codage%20Delta%20PCM
correct, masculine noun
- modulation PCM 1, record 1, French, modulation%20PCM
feminine noun
- codage MIC différentiel 2, record 1, French, codage%20MIC%20diff%C3%A9rentiel
correct, masculine noun
- codage MIC D 2, record 1, French, codage%20MIC%20D
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Le codage MIC différentiel (MIC D) consiste à ne transmettre d'une image que les éléments qui ont changé par rapport à la précédente. 3, record 1, French, - codage%20DPCM
Record number: 1, Textual support number: 2 CONT
Le codage DPCM (Delta PCM ou modulation Delta) permet de réduire l'encombrement en codant la différence entre les valeurs successives échantillonnées et non plus les valeurs elles-mêmes. Le nombre de bits nécessaire pour le codage est moindre. 1, record 1, French, - codage%20DPCM
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 1995-02-23
Record 2, English
Record 2, Subject field(s)
- Audiovisual Techniques and Equipment
Record 2, Main entry term, English
- PCM coding
1, record 2, English, PCM%20coding
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- pulse-coded modulation coding 1, record 2, English, pulse%2Dcoded%20modulation%20coding
proposal
- pulse-code modulation coding 1, record 2, English, pulse%2Dcode%20modulation%20coding
proposal
Record 2, Textual support, English
Record 2, French
Record 2, Domaine(s)
- Audiovisuel (techniques et équipement)
Record 2, Main entry term, French
- codage PCM
1, record 2, French, codage%20PCM
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- codage MIC 1, record 2, French, codage%20MIC
correct, masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Le codage de base pour le son numérique est PCM («Pulse Code Modulation»), que l'on traduit assez rarement par MIC (Modulation par Impulsions Codées). Ce codage est une simple transformation des signaux analogiques en signaux numériques. Il n'inclut aucune compression sonore. C'est le type de codage utilisé par le CD-audio et les cartes sonores pour micro-ordinateurs. Les deux paramètres significatifs de ce codage sont la fréquence d'échantillonnage (en kHz) et la quantification (en bits). Le Tableau 5.4 montre les domaines d'application selon l'échantillonnage et la quantification. 1, record 2, French, - codage%20PCM
Record 2, Spanish
Record 2, Textual support, Spanish
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