DocumentCode
2535934
Title
Implementation of an asynchronous current-mode ADC with adaptive quantization
Author
Virtanen, Kati ; Pänkäälä, Mikko ; Laiho, Mika ; Paasio, Ari
Author_Institution
Dept. of Inf. Technol., Turku Univ.
fYear
2006
fDate
21-24 May 2006
Abstract
This paper presents the measurement results for an analog to digital converter (ADC), which is targeted to operate especially in a video encoding system. It is designed to convert the dc coefficients of a current-mode discrete cosine transform into digital form. The converter is able to change its quantization factor adaptively, fulfilling the demands of several video compression standards. The maximum conversion resolution is 7frac12 bits. The measurements verify correct operation of the converter in terms of input-output behaviour and adaptivity of the quantization
Keywords
analogue-digital conversion; asynchronous circuits; current-mode circuits; discrete cosine transforms; quantisation (signal); video coding; adaptive quantization; asynchronous current-mode analog-to-digital converter; discrete cosine transform; video encoding system; Analog-digital conversion; Bit rate; Circuits; Discrete cosine transforms; Encoding; Energy consumption; Image converters; Image quality; Quantization; Video compression;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location
Island of Kos
Print_ISBN
0-7803-9389-9
Type
conf
DOI
10.1109/ISCAS.2006.1692886
Filename
1692886
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