Title :
A current-mode ADC with adaptive quantization
Author :
Virtanen, Kati ; Pänkäälä, Mikko ; Paasio, Ari
Author_Institution :
Dept. of Inf. Technol., Turku Univ., Finland
Abstract :
The paper presents an analog to digital converter (ADC) targeted for converting current-mode discrete cosine transform (DCT) coefficients to digital bits. The conversion is performed in parallel and the operation is continuous in time. Adaptive quantization is included in the converter to fulfil the demands of several video compression standards. The design has relatively low power consumption and the maximum conversion accuracy is 7 1/2 bits.
Keywords :
CMOS integrated circuits; adaptive signal processing; current-mode circuits; data compression; discrete cosine transforms; integrated circuit design; mixed analogue-digital integrated circuits; power consumption; quantisation (signal); video coding; CMOS technology; DCT coefficients; adaptive quantization; analog to digital converter; conversion accuracy; current-mode ADC; discrete cosine transform coefficients; power consumption; video compression; Analog-digital conversion; Discrete cosine transforms; Energy consumption; Frequency; Image converters; Image quality; Information technology; Microelectronics; Quantization; Video compression;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465287
