Uroš Lotrič (Avtor), Ratko Pilipović (Avtor), Patricio Bulić (Avtor)

Povzetek

Multiplication is an essential image processing operation commonly implemented in hardware DSP cores. To improve DSP cores’ area, speed, or energy efficiency, we can approximate multiplication. We present an approximate multiplier that generates two partial products using hybrid radix-4 and logarithmic encoding of the input operands. It uses the exact radix-4 encoding to generate the partial product from the three most significant bits and the logarithmic approximation with mantissa trimming to approximate the partial product from the remaining least-significant bits. The proposed multiplier fills the gap between highly accurate approximate non-logarithmic multipliers with a complex design and less accurate approximate logarithmic multipliers with a more straightforward design. We evaluated the multiplier’s efficiency in terms of error, energy (power-delay-product) and area utilisation using NanGate 45 nm. The experimental results show that the proposed multiplier exhibits good area utilisation and energy consumption and behaves well in image processing applications.

Ključne besede

aproksimativni množilnik;aproksimativno računalništvo;načrtovanje aritmetičnih vezij;hibridno kodiranje;radix-4 kodiranje;logaritemsko kodiranje;energijsko učinkovito računanje;approximate multiplier;approximate computing;arithmetic circuit design;hybrid encoding;radix-4 encoding;logarithmic encoding;energy-efficient processing;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FRI - Fakulteta za računalništvo in informatiko
UDK: 004
COBISS: 63386371 Povezava se bo odprla v novem oknu
ISSN: 2079-9292
Št. ogledov: 104
Št. prenosov: 36
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: aproksimativni množilnik;aproksimativno računalništvo;načrtovanje aritmetičnih vezij;hibridno kodiranje;radix-4 kodiranje;logaritemsko kodiranje;energijsko učinkovito računanje;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-20
Letnik: ǂVol. ǂ10
Zvezek: ǂno. ǂ10
Čas izdaje: May 2021
DOI: 10.3390/electronics10101175
ID: 14785412