Talk:Vector quantization

message: An expression occurring in existential sentences. "For some x" is the same as " exists x." Unlike in everyday language, it is does not necessarily refer to a plurality of elements, and so might be more clearly represented in colloquial English as "for at least one." (Turkialjrees (talk) 16:44, 14 March 2015 (UTC)
thread_title:  "Some math" 

message: create set of prototypes = w^1,w^2,\dots,w^K, w^k \in \mathbb{R}^n
the data = \xi^1,\xi^2,\dots,\xi^p, \xi^k \in \mathbb{R}^n
by using the Squared_Euclidean_Distance
we can determine the multidimention distance between a prototype and a data point.
L_2(a,b) =  \sum_{i=1}^d|a_i-b_i|
Based on this we can find the closest prototype to a given datapoint.
w^{i*} = argmin_j \{d[w^j,\xi]\}
assign \xi  to prototype i^*
This way the winner takes it all and the closest prototype should be moved using:
 w^{i^*} \xi \to w^{i^*} + \eta( \xi^t - w^{i^*})
where \eta < 1 is the learning rate
Spidfire (talk) 15:29, 31 January 2013 (UTC)
thread_title:  The Math 

message: Damn.  This article made me feel dumb.  --NoPetrol 06:41, 24 Nov 2004 (UTC)
replies: text: I have modified the article to give a clear explanation of what vector quantization is, together with some uses for it. It still needs tidying up and referencing Pog 21:46, 1 August 2007 (UTC)
replies: text: also want to see pictures  —Preceding unsigned comment added by 138.246.7.74 (talk) 13:50, 15 July 2010 (UTC)
thread_title: clarity?

message: : "Find the quantization vector centroid with the smallest <distance-sensitivity>"
What does "<distance-sensitivity>" mean?  Does it mean sensitivity?  Or does it mean distance minus sensitivity? -Pgan002 00:17, 18 August 2007 (UTC)
thread_title:  Unclear sentence 

message: Why the hell is there a picture of an aeroplane on this page?  —Preceding unsigned comment added by Criffer (talk • contribs) 16:24, 11 October 2007 (UTC)
thread_title:  Spam 

message: "All possible combinations of the N-dimensional vector [y1,y2,...,yn] form the Gaurav."
What the hell is a Gaurav?
Secondly, even if there is a correct technical term for all possible combinations of an N-Dimensional vector, it is completely out of context in that particular article. It should be removed, or correct and given a context.  —Preceding unsigned comment added by 198.151.130.16 (talk) 21:46, 1 April 2011 (UTC)
thread_title:  Use in data compression 

message: From the article:
Block Diagram: A simple vector quantizer is shown below
Huh? Where is it? Cuddlyable3 (talk) 09:15, 7 June 2011 (UTC)
thread_title:  Where is a block diagram? 

message: From my limited experience, it seems most groups will have similar numbers, but a few groups (clusters) will have very few or very many elements assigned to it.  So most clusters (maybe 60~80 %) will have a similar number of elements, but the remainder will have very few or very many elements.
Hydradix (talk) 04:53, 13 October 2014 (UTC)
thread_title:  VERY approximate 

message: Article's "alternate training" method seems biased towards simulated annealing.  No mention is made at all of the Linde–Buzo–Gray algorithm which is a fundamental starting point for most VQ implementations and is the most widely-cited paper in VQ work.  No mention is made of PNN (Pair Nearest Neighbor) or other codebook generation methods either.
--Trixter (talk) 19:49, 26 August 2013 (UTC)
thread_title:  No mention of LBG or other methods 

message: I decided to be bold, and added in-page links to LBG and K-Means... I also added LBG to the References.... I tried/wanted to add Enhanced LBG to External References, but when I tired Wikipedia Preview the link would always fail (http://anale-informatica.tibiscus.ro/download/lucrari/2-1-02-balint.pdf) so ELBG was not referenced.  — Preceding unsigned comment added by Hydradix (talk • contribs) 08:34, 5 October 2014 (UTC)
thread_title:  update 

message: I have no mathematical background. Despite my interest in signal processing, I didn't understand a word of the lede and used external information to add a sentence for the mortals among us. Once I gain a good understanding of the topic, I will update the article with more understandable information. --Holzklöppel (talk) 09:32, 11 October 2023 (UTC)
thread_title:  Article is too technical and abstract