Custom CMOS Reed Solomon coder for the Hubble Space Telescope

Taking someone else’s visual perspective marks an evolutionary shift in the formation of advanced social cognition. It enables using others’ attention to discover otherwise hidden aspects of the surroundings and is foundational for human communication and understanding of others. Visual perspective taking has also been found in some other primates, a few songbirds, and some canids. However, despite its essential role for social cognition, visual perspective taking has only been fragmentedly studied in animals, leaving its evolution and origins uncharted. To begin to narrow this knowledge gap, we investigated extant archosaurs by comparing the neurocognitively least derived extant birds—palaeognaths—with the closest living relatives of birds, the crocodylians. In a gaze following paradigm, we showed that palaeognaths engage in visual perspective taking and grasp the referentiality of gazes, while crocodylians do not. This suggests that visual perspective taking originated in early birds or nonavian dinosaurs—likely earlier than in mammals.

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“…All videos were coded using Solomon Coder (71). When coding trials of all three experiments, we coded "target location" and "checking-back".…”

Section: Coding Definitionsmentioning

confidence: 99%

Gaze following in Archosauria—Alligators and palaeognath birds suggest dinosaur origin of visual perspective taking

2023

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“…Large state controllers can almost always be partitioned into small distributed state machines. Two full custom developments [5,6] predecessor state for 5< is the code for Si and the constants for this code are input to the BTS network. A general block diagram is shown in Figure 2, where the next state logic is a general BTS network.…”

Section: Binary Tree Structured Logicmentioning

confidence: 99%

Reliable VLSI sequential controllers

Whitaker

Maki

Shamanna

1991

International Journal of Electronics

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-A VLSI architecture for synchronous sequential controllers is presented that has attractive qualities for producing reliable circuits. In these circuits, one hardware implementation can realize any flow table with a maximum of 2 n internal states and ra inputs. Also all design equations are identical. A real time fault detection means is presented along with a strategy for verifying the correctness of the checking hardware. This self check feature can be employed with no increase in hardware. The architecture can be modified to achieve fail safe designs. With no increase in hardware, an adaptable circuit can be realized that allows replacement of faulty transitions with fault free transitions.

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“…For example RS codes have been applied to the compact disc (CD) system [l], advanced train control systems [2], the Hubble space telescope [3] and channel coding for compressed video services [4]. RS codes operate over algebraic structures called finite fields, denoted GF @") , and because of the ease with which they can be implemented in digital hardware, these fields are usually restricted to those of the form GF(2'") [5].…”

Section: Introductionmentioning

confidence: 99%

Generalised triangular basis multipliers for the design of Reed-Solomon codecs

Furness

Benaïssa²,

Fenn³

1997 IEEE Workshop on Signal Processing Systems. SiPS 97 Design and Implementation Formerly VLSI Signal Processing

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In this paper a generalised definition of a triangular basis for CF(F) ispresented. This definition is more flexible than the traditional definition and allows a number of triangular bases to be determined to any given basis. The triangular basis to the polynomial basis can then be used which has the simplest basis transformation in modified Hasan-Bhargava multipliers. It is shown that when the defining irreducible polynomial for the field is a trinomial, the triangular basis is a permutation of the polynomial basis elements. Furthermore, if the defining irreducible polynomial is a pentanomial of a certain form, the triangular basis can be obtained from the polynomial basis with a reordering of the coefficients and two GF(2) additions. This new definition of triangularity allows for reduced complexity modified Hasan-Bhargava multipliers to be designed which in turn reduces the hardware complexity of Reed-Solomon codecs using these multipliers. Finally, a simple method of making large hardware savings in Reed-Solomon decoders utilising frequency domain decoding is presented.0-7803-3806-5/97/$10.00 0 1 997 IEEE 202 expense of a hardware increase in the encoder. Similarly in the case of an RS (255,223) code, the saving of 223 constant multipliers equates to a hardware saving of around 3,500 XOR gates when using bit-parallel multipliers at the expense of an increase of 48 XOR gates in the encoder. J J

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Custom CMOS Reed Solomon coder for the Hubble Space Telescope

Cited by 3 publications

References 2 publications

Gaze following in Archosauria—Alligators and palaeognath birds suggest dinosaur origin of visual perspective taking

Gaze following in Archosauria—Alligators and palaeognath birds suggest dinosaur origin of visual perspective taking

Reliable VLSI sequential controllers

Generalised triangular basis multipliers for the design of Reed-Solomon codecs

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