Big brain stuff
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4 changed files with 52 additions and 9 deletions
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@ -239,7 +239,6 @@ This is also shown in @fig:smhd_2_2_reconstruction, as our quantizer curve is mo
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If a odd number of metrics is given, the offset can still be calculated using @eq:offset. Additionally, we will keep the original quantizer used during enrollment (@fig:smhd_3_2_reconstruction).
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Comparing @fig:smhd_2_2_reconstruction, @fig:smhd_3_2_reconstruction and their respective values of @eq:offset, we can observe, that the offset $phi$ gets smaller the more metrics we use.
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]
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#figure(
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@ -254,12 +253,52 @@ Comparing @fig:smhd_2_2_reconstruction, @fig:smhd_3_2_reconstruction and their r
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caption: [Offset values for 2-bit configurations]
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)<tab:offsets>
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Before we can go deeper into the properties of the offset value $phi$, we will introduce a way to programmatically find the offset values for all s quantizers.
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#figure(
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kind: "algorithm",
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supplement: [Algorithm],
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Lets look deeper into the properties of the offset value $phi$.
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As previously stated, we will need to move the enrollment quantizer $s/2$ times to the left and $s/2$ times to the right.
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For example, setting parameter $s$ to $4$ means we will need to need to move the enrollment quantizer $lr(s/2 mid(|))_(s=4) = 2$ times to the left and right.
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As we can see in @fig:4_2_offsets, $phi$ for the indices $i = plus.minus 2$ are identical to the offsets of a 2-bit 2-metric configuration.
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In fact, this property carries on for higher even numbers of metrics.
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#grid(
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columns: (1fr, 1fr),
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[#figure(
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table(
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columns: (5),
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inset: 7pt,
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align: center + horizon,
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[$bold(i)$], [$-2$], [$-1$], [$1$], [$2$],
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[*Metric*], [M1], [M2], [M3], [M4],
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[$bold(phi)$], [$-frac(1, 16)$], [$-frac(1, 32)$], [$frac(1, 32)$], [$frac(1, 16)$]
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),
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caption: [2-bit 4-metric offsets]
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)<fig:4_2_offsets>
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],
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[#figure(
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table(
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columns: (7),
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align: center + horizon,
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inset: 7pt,
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[$bold(i)$], [$-3$], [$-2$], [$-1$], [$1$], [$2$], [$3$],
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[*Metric*], [M1], [M2], [M3], [M4], [M5], [M6],
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[$bold(phi)$], [$-frac(1, 16)$], [$-frac(1, 24)$], [$-frac(1, 48)$], [$frac(1, 48)$], [$frac(1, 24)$], [$frac(1, 16)$]
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),
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caption: [2-bit 6-metric offsets]
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)<fig:6_2_offsets>
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]
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)
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At $m=6$ metrics, the biggest offset we encounter is $phi = 1/16$ at $i = plus.minus 3$.\
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In conclusion, the maximum offset for a 2-bit configuration $phi$ is $1/16$ and we will introduce smaller offsets in between if we use a higher even number of metrics. More formally, we can define the maximum offset for an even number of metrics as follows:
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$ phi_("max,even") = frac(frac(m,2), 2^n dot m dot 2) = frac(1, 2^n dot 4) $<eq:max_offset_even>
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Here, we multiply @eq:offset with the maximum offsetting index $i_"max" = s/2$.
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Now, if we want to find the maximum offset for a odd number of metrics, we need to modify @eq:max_offset_even, more specifically its numerator.
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We know, that we need to keep the original quantizer for a odd number of metrics, besides that, the method stays the same.
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For that reason, we will decrease the parameter $m$ by $1$:
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$
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phi_"max_odd" &= frac(frac(m-1, 2), 2^n dot m dot 2)\
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&= lr(frac(m-1, 2^n dot m dot 4)mid(|))_(n=2, m=3) = 1/24
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$
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include("../pseudocode/find_quantizers.typ")
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)<alg:fancy>
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As shown in @alg:fancy
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BIN
main.pdf
BIN
main.pdf
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4
main.typ
4
main.typ
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@ -6,6 +6,10 @@
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#import "@preview/tablex:0.0.8"
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#import "@preview/unify:0.6.0"
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#import "@preview/quill:0.3.0"
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#import "@preview/equate:0.2.0": equate
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#show: equate.with(breakable: true, sub-numbering: true)
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#set math.equation(numbering: "(1.1)")
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#import "template/conf.typ": conf
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@ -36,7 +36,7 @@
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pagebreak()
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set math.equation(numbering: "(1)")
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//set math.equation(numbering: "(1)")
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set page(
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paper: "a4",
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