Janko Calic

MTAP journal published online

Janko — Fri, 29 Jan 2010 10:10:18 +0000

Our user evaluation of FreeEye browsing interface was published online as a pre-print, and can be found at:

http://dx.doi.org/10.1007/s11042-009-0445-y

Interactive search and browsing interface for large-scale visual repositories.

Kan Ren, Risto Sarvas, Janko Calic.

Due to the rapid proliferation of both user-generated and broadcasted content, the interfaces for search and browsing of visual media have become increasingly important. This paper presents a novel intuitive interactive interface for browsing of large-scale image and video collections. It visualises underlying structure of the dataset by the size and spatial relations of displayed images. In order to achieve this, images or video key-frames are initially clustered using an unsupervised graph-based clustering algorithm. By selecting images that are hierarchically laid out on the screen, user can intuitively navigate through the collection or search for specific content. The extensive experimental results based on user evaluation of photo search, browsing and selection as well as interactive video search demonstrate good usability of the presented system and improvement when compared to the standard methods for interaction with large-scale image and video collections.

Fourier Transform of the pulse train

Janko — Mon, 14 Dec 2009 10:11:59 +0000

A derivation and explanation of the link between the FT of the pulse train and a sum of complex exponentials, as presented at lectures as an example of the Discrete Fourier Series (Section 5.2.1 in the DSPA notes).

impulsion-train

Filter Design

Janko — Mon, 14 Dec 2009 10:08:36 +0000

An excellent and comprehensive guide to filter design.

Filter Design Chapter

Introduction to Wavelets

Janko — Mon, 14 Dec 2009 09:15:28 +0000

Here is a good and lightweight introduction to wavelets.

Intro_to_Wavelets.pdf

Multirate systems and filter banks

Janko — Mon, 14 Dec 2009 09:02:36 +0000

This is an excellent introductionary read for multirate DSP and filter banks.

Ch4_Multirate_systems_and_filter_banks

To open this file see http://www.djvu.org/ for resources.

Sigma-Delta Modulation

Janko — Mon, 07 Dec 2009 08:45:55 +0000

A good tutorial on sigma-delta modulation, demonstrating complexity of a real DSP system design and concepts of sampling, multirate processing and FIR filter design. A very nice read.

Principles of Sigma-Delta Modulation for Analog to Digital Converters

Regards,

Janko Calic | CCSR University of Surrey

Regards,
Janko Calic | University of Surrey

DSPA Lecture Notes

Janko — Mon, 30 Nov 2009 13:00:09 +0000

Current (ever incomplete) version of the DSPA Lecture notes can be downloaded here:

DSPA Notes

Good luck!

Monday; November 30, 2009

Collab session description

Janko — Tue, 06 Oct 2009 15:56:56 +0000

Collab sessions bring you the possibility to learn and boost your enquiry into the DSP. Through collaboration and group work you will gain more insight into the learning process and the module content.

Collab sessions will take place on Thursdays from 12:00-13:00h in the rooms 01AC03, 02AC03, 03AC03 and 04AC03. These rooms are designed to facilitate group work, with walls that we can write on and flexible room layout. Depending upon the attendance, we may be expanding to all four rooms, but the target is to fit us all in two rooms. The groups will comprise 5-6 students and will be randomised at every session.

Written Preps

Preps are a physical result of your enquiry. At the end of each collab session (Mondays 13-15h), you will be given topics for the following week. Your inquisitive mind will explore the new area and generate the prep notes by hand. Preps are required to be completely hand-written and hand-drawn in a biggish A4 notebook, possibly together with your notes from the lectures. This will be your best revision material. The prep notes will be assessed. Make sure that you represent your enquiry in the best possible way – we will have only a couple of minutes to grasp the depth of your enquiry and understanding of the new matter. Knowing that a picture is worth a thousand words, draw more. Be creative.

Session plan

Approx. Time	Student’s actions
00-05	Sign in, get your group assigned a topic, sit down and get ready
05-25	Present the prep to your group with critical reflections, with all pros and cons. Discuss it.
25-30	Write an outline of an ideal prep on the wall.
30-00	As a group, give a 5 minute presentation of the prep. Others ask questions and discuss.

Assessment

The 20% of the overall module mark will come from the Collab marks. Assessment will take into account quality of the written preps (35%), your individual effort during the collab sessions/presentation (35%) and a group mark for the quality of the presented prep (30%), all assessed by the session supervisors.

Teaching plan for 2009/10

Janko — Mon, 05 Oct 2009 15:39:34 +0000

Week-by-Week breakdown of the 09/10 school year, with up-to-date schedule for DSPA Collab preparation themes.

Structure of the Academic Year 09-10 – Dept. of Electronic Engineering

Wk	Wks beg. Mon	09-10	Comments
	Induction	28 Sept	… Induction week for all new students
1	Teaching (S1/T1)	5 Oct	L: Test, Introduction to process, Exam and Collab marks, Demo; C: mock-up of Collab, me doing bad Sampling 1.4, Joe doing good Reconstruction 1.5, with Q&A and discussion afterwards, tell students to prepare ZT …
2	Teaching	12 Oct	L: Sampling, LTI; C: ZT, tell them to prepare IIR1: filter design, IIR Impulse invariance and Butterworth …
3	Teaching	19 Oct	L: ZT; C: IIR 1, tell them to prepare IIR 2: bilinear, Butterworth, Chebyshev I and II, Elliptic approx. …
4	Teaching	26 Oct	L: IIR1; C: IIR2, tell them to prepare FIR Rdg Wk L2 & 3 TON modules
5	Teaching	2 Nov	L: IIR2; C: FIR, tell them to prepare DFT L1 TPAS peer marking (1)
6	Teaching	9 Nov	L: FIR; C: DFT, tell them to prepare FFT …
7	Reading Week	16 Nov	… Rdg Wk (All levels) except COM & TON modules & MDDP
8	Teaching	23 Nov	L: DFT; C: FFT, to prepare Multirate 1: decimation, interpolation, polyphase …
9	Teaching	30 Nov	L: FFT; C: Multirate 1, to prepare Multirate 2: multistage, filter banks, wavelets L1 TPAS peer marking (2)
10	Teaching	7 Dec	L: Multirate 1; C: Multirate 2, to prepare exam questions from last year …
11	Teaching	14 Dec	L: Multirate 2; C: Exam questions from last year (Last day of Term 1) 18 Dec
		21 Dec
	Christmas Break	28 Dec
		4 Jan
12	Teaching/Rev.(T2)	11 Jan	L: Exam questions from last year; C: Tutorial L1 TPAS peer marking (3)
13	Teaching/Revision	18 Jan	L: Revision; C: Tutorial
14	Exams + Tests	25 Jan	L3 & M exams. Leadership (L3 BA & L2 EDPS)
15	Exams + Tests	1 Feb	L3 & M ex. tests L1 & L2. L2 Enter & LM MDDP presentations.
1	Teaching (S2)	8 Feb
2	Teaching	15 Feb
3	Teaching	22 Feb	Exam Boards
4	Teaching	1 March	L1 TPAS peer marking (4)
5	Teaching	8 March
6	Teaching	15 Mar
7	Teaching	22 Mar	L1 TPAS peer marking (5), Last day T2 26 March
		29 Mar
		5 April
	Spring Break	12 April
		19 April
8	Teaching (T3)	26 April
9	Teaching	3 May
10	Teaching	10 May	L1 TPAS peer marking (6)
11	Teaching/Revision	17 May
12	Revision	24 May
13	Exams	31 May	L3 & M exams
14	Exams	7 June	L3 & M exams + L1 & 2 exams
15	Exams	14 June	L1 &2 exams. L3 projects exams,Last day T3 18 June
+1		21 June	Exam Boards
+2		28 June	Exam Boards

Joe’s welcome

joe — Mon, 05 Oct 2009 10:04:04 +0000

Hi there!

My name is Joe Kornycky and I am a PhD student here at Surrey. I will be helping out with this year’s DSPA module.

I am currently working in the same department as Janko in the area of DSP focusing on microphone array signal processing and statistical signal separation. Before my PhD I obtained my BEng degree from Surrey and actually took the DSPA module, so I have some real experience with what you are doing.

Please feel free to ask lots of questions and make good use of this blog and my time in the tutorials. Best of luck with DSPA and all your modules.

Joe