Continued on Reconstruction
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4 changed files with 38 additions and 3 deletions
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@ -190,7 +190,7 @@ If $s$ is even, we need to move our quantizer $s/2$ times some distance to the r
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We can define the ideal position for the quantizer bounds based on its corresponding metric as centered around the center of the related metric.
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We can define the ideal position for the quantizer bounds based on its corresponding metric as centered around the center of the related metric.
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We can find these new bounds graphically as depicted in @fig:smhd_find_bound_graph. We first determine the x-values of the centers of a metric (here M1, as shown with the arrows). We can then place the quantizer steps with step size $Delta$ (@eq:delta) evenly spaced around these points.
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We can find these new bounds graphically as depicted in @fig:smhd_find_bound_graph. We first determine the x-values of the centers of a metric (here M1, as shown with the arrows). We can then place the quantizer steps with step size $Delta$ (@eq:delta) evenly spaced around these points.
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With these new points for the vertical steps of $cal(Q)$, we can draw the new quantizer for the first metric in @fig:smhd_found_bound_graph.
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#grid(
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#grid(
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@ -205,5 +205,14 @@ We can find these new bounds graphically as depicted in @fig:smhd_find_bound_gra
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#figure(
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#figure(
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include("../graphics/quantizers/s-metric/2_2_found_quantizer1.typ"),
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include("../graphics/quantizers/s-metric/2_2_found_quantizer1.typ"),
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caption: [Quantizer for the first metric]
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caption: [Quantizer for the first metric]
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)]]
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)<fig:smhd_found_bound_graph>]]
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)
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)
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As for metric 2, we can apply the same strategy and find the points for the vertical steps to be at $1/16, 5/16, 9/16$ and $13/16$. This quantizer can be visualized together with the first metric quantizer in @fig:smhd_2_2_reconstruction, forming the complete quantizer for the reconstruction phase of a 2-bit 2-metric configuration $cal(R)(2,2,tilde(x))$.
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#figure(
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include("../graphics/quantizers/s-metric/2_2_reconstruction.typ"),
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caption: [2-bit 2-metric reconstruction quantizer]
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)<fig:smhd_2_2_reconstruction>
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@ -6,7 +6,7 @@
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plot.plot(size: (8,6),
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plot.plot(size: (8,6),
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x-tick-step: none,
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x-tick-step: none,
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x-ticks: ((3/16, [3/16]), (7/16, [7/16]), (11/16, [11/16]), (15/16, [15/16])),
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x-ticks: ((3/16, [3/16]), (7/16, [7/16]), (11/16, [11/16]), (15/16, [15/16])),
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y-label: $cal(Q)(2, 1, tilde(x))$,
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y-label: $cal(Q)(2, 2, tilde(x))$,
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x-label: $tilde(x)$,
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x-label: $tilde(x)$,
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y-tick-step: none,
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y-tick-step: none,
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y-ticks: ((3/16, [00]), (7/16, [01]), (11/16, [10]), (15/16, [11])),
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y-ticks: ((3/16, [00]), (7/16, [01]), (11/16, [10]), (15/16, [11])),
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26
graphics/quantizers/s-metric/2_2_reconstruction.typ
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graphics/quantizers/s-metric/2_2_reconstruction.typ
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@ -0,0 +1,26 @@
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#import "@preview/cetz:0.2.2": canvas, plot
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#let line_style = (stroke: (paint: red, thickness: 2pt))
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#let line_style2 = (stroke: (paint: blue, thickness: 2pt))
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#let dashed = (stroke: (dash: "dashed"))
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#canvas({
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plot.plot(size: (8,6),
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legend: "legend.south",
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legend-style: (orientation: ltr, item: (spacing: 0.5)),
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x-tick-step: 1/4,
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//x-ticks: ((3/16, [3/16]), (7/16, [7/16]), (11/16, [11/16]), (15/16, [15/16])),
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y-label: $cal(R)(2, 2, tilde(x))$,
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x-label: $tilde(x)$,
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y-tick-step: none,
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y-ticks: ((3/16, [00]), (7/16, [01]), (11/16, [10]), (15/16, [11])),
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axis-style: "left",
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x-min: 0,
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x-max: 1,
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y-min: 0,
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y-max: 1,{
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plot.add(((0,3/16), (3/16,3/16), (7/16,7/16), (11/16,11/16), (15/16, 15/16), (15/16, 3/16), (1, 3/16)), line: "vh", style: line_style, label: [Metric 1])
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plot.add(((0, 15/16), (1/16, 15/16), (1/16, 3/16), (5/16, 3/16), (9/16, 7/16), (13/16, 11/16), (13/16, 15/16), (1, 15/16)),line: "vh", style: line_style2, label: [Metric 2])
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plot.add-hline(3/16, 7/16, 11/16, 15/16, style: dashed)
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plot.add-vline(3/16, 7/16, 11/16, 15/16, style: dashed)
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})
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})
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