Short Message Service or Silent Messaging Service (SMS) is a communication service standardized in the GSM mobile communication system, using standardized communication protocols allowing the interchange of short text messages between mobile telephone devices.

There are some words that i always use when sms.
~ u = you
~ v = we
~ don't = dun
~ have = hav
~ 9 = night
~ 8 = bye
~ gd = good
~ b'day = birthday
~ tat = that
~oredi = already


...chan...

30 Sept 2009 Wednesday

Today was the last day that Miss Azura gave us lecture, that means we will do our presentation by group on the following classes. Today's topic is digitalization data, the first is introduction and following is digital era, include digital texts era, digital audio era, digital video era and digital publishing.
This post also is the last post for this assignment. Sounds good for us..hihi...
Miss Azura also have talked about how to mark our assignments and remind us still got one quiz is coming soon.
Hope that all classmates can get the result with flying colour and Miss Azura everything okie.


...chan...

27 Sept 2009 Sunday

Today Miss Azura gave us lecture about multimedia, there are 5 part for this topic. Firstly, Miss Azura explained what is multimedia, types of multimedia presentation which are linear multimedia and interactive multimedia. The part 2 is multimedia system characteristics and part 3 is multimedia building block which are text, sound, image animation and video. After that, MIss Azura showed us some video about the topic.


...chan...

""""" RCA """""

RCA >> Radio Corporation of America, was an electronics company in existence from 1919 to 1986.

During the first years the company owned parts of the British His Master's Voice (now part of EMI) and the German Deutsche Grammophon Gesellschaft (now part of Universal). Since 2004, RCA is now the backbone of the RCA Music Group, a unit of Sony BMG, which includes J Records, RCA and Arista.

An RCA connector, sometimes called cinch plug or lotus plug, is a type of electrical connector that is commonly used in the audio or video market. For many other applications it began to replace the older hack plugs used in the audio world when component high fidelity started becoming popular in the 1950s.

In the most normal usage, cables have a standard plug on each end, consisting of a central male connector, surrounded by a ring. The ring is often segmented for flexibility. Devices mount the jack, consisting of a central hole with a ring of metal around it. The ring is slightly smaller in diameter and longer than the ring on the plug, allowing the plug's ring to fit tightly over it. The jack has a small area between the outer and inner rings which is filled with an insulator, typically plastic (very early versions, or those made for use as RF connectors used ceramic).

As with many other connectors, the RCA has been adopted for other uses than originally intended, including as a power connector, an RF connector, and as a connector for loudspeaker impedance matching. RCA connectors and cable are also commonly used to carry S/PDIF-formatted digital audio, with plugs colored orange to differentiate them from other typical connections. cables. Its use as a connector for composite video signals is extremely common, but provides poor

Connections are made by pushing the cable's plug into the female jack on the device. The signal-carrying pin protrudes from the plug, and often comes into contact with the socket before the grounded rings meet, resulting in loud hum or buzz if the audio components are powered while making connections. Continuous noise can occur if the plug partially falls out of the jack, breaking ground connection but not the signal. Some variants of the plug, especially cheaper versions, also give very poor grip and contact between the ground sheaths due to their lack of flexibility.

They are often color-coded, yellow for composite video, red for the right channel, and white or black for the left channel of stereo audio. This trio (or pair) of jacks can be found on the back of almost all audio and video equipment. At least one set is usually found on the front panel of modern TV sets, to facilitate connection of camcorders (through 3.5mm Jack to 3 RCA, also called Mini RCA plug), digital cameras, and video gaming consoles. Although nearly all audio-visual connectors, including audio, composite and component video, and S/PDIF audio can use identical 75 Ω cables, sales of special-purpose cables for each use have proliferated. Varying cable quality means that a cheap line-level audio cable might not successfully transfer component video or digital audio signals due to impedance mismatch and poor shielding quality (causing signal-to-noise ratio to be too low). Cables should meet the S/PDIF specification as defined by the international standard IEC 60958-3 for assured performance.

The male plug has a center pin which is 3.70 mm in diameter, and is surrounded by an outer shell which is 8.25 mm in diameter.

Plugs and sockets on consumer equipment are conventionally color-coded to aid correct connections. The standard colors for the various signals are shown below.

In stereo audio applications there are combination of either Black+Red or White+Red RCA connectors; in both cases, Red denotes Right. White or Purple may also be replaced by Black.

While these are the standard colours found on commercially made products, same-coloured cables may also be used. For example, a red cable may be used instead of a yellow one, as there is no other significant difference between them.

...chan...

13 Sept 2009 Sunday

Today we learned chapter 7 in this lecture. Topic of chapter 7 is video production and multimedia network. Content of this topic are Video Communication, Analog TV Standards, Digital TV (DTV) and High-Definition TV (HDTV), Multimedia Standards, and Video and Multimedia Prospects. Miss Azura explained to us clearly about the topic one by one. Today was a important day because we need to summit our third individual assignment today. Besides that, our class on Wednesday will be cancel. I think it is a good news for every student....XD...


...chan...

6 Sept 2009 Sunday

Today is Sunday...blogging again...Hihi..
Lecture continue with chapter 6 section 2..topic are telephone system and cellular phone system. Some of content very similar to us, such as 3G. Our group will present on 7 October..


...chan...

~~ RazakSAT Satellite ~~

The RazakSAT mission is to ensure the availability of satellite imaging for any part of Malaysia in order to fulfill the requirements of the local remote sensing user community. Malaysia has been dependent on remote sensing satellite imagery provided by other Satellite Operating Agencies (SOAs) that have been constrained by cloud and timeliness. To alleviate those constraints, RazakSAT will be uniquely placed in a Low Earth Near Equatorial Orbit (NEqO). RazakSAT will carry the Medium-sized Aperture Camera (MAC) which is an electro-optical payload of a pushbroom type with 5 linear detectors (1 panchromatic, 4 multispectral). At a nominal altitude of 685 km and 9° inclination orbit, it will provide an optimal number of 14 passes a day over Malaysia thereby increasing its imaging opportunity by over 3 times compared to a satellite orbiting the Earth in the more popular Sun-Synchronous Orbit (SSO). The NEqO enables RazakSAT to provide higher imaging opportunity for Malaysia and other countries that are situated in the near equatorial belt of 9° North and South of the Equator.

RazakSAT offers a Panchromatic band (510 - 730 nm) and 4 Multispectral Bands: Band 1: Blue (450 - 520 nm); Band 2: Green (520 - 600 nm); Band 3: Red (630 - 690 nm) and Band 4: Near-Infrared (760 - 890 nm). The spatial resolution of 2.5 m and 5 m for Panchromatic and Multispectral, respectively, covers a swath width of 20 km at the 685 km nominal altitude. Data is being quantized into 8 bits of 256 brightness values to represent information.

As Malaysia is located between latitude 1° - 9° North and longitude 98° - 120° East, the image acquisition is optimum when the orbit is inclined at 9° to provide 14 passes daily over Malaysia and other countries in the near equatorial region with 1 to 4 times imaging opportunities per day. The average contact duration of about 500 seconds with 30 Mbps transmission rate enables downloading an image strip size of 11.52 Gbits for a nominal scene size of 20km by 200km.

Remote sensing applications have been widely utilized in Malaysia by various government agencies and private sector. This user community is targeted to be the immediate beneficiaries that will realize the full exploitation of the RazakSAT data for various applications in the country and the region. In the same time, other users within the near equatorial belt will also reap the benefits from this accessible high resolution satellite imagery.

The development of RazakSAT and MAC would be a benchmark for future missions to improve for higher and better performance remote sensing technology. The infrastructure establishment of a space system like RazakSAT through human capital development and facilities sets the fundamentals for ATSB to advance into the future with the motivation to contribute towards space technology and remote sensing through local and international collaborations and providing products and services locally and internationally.



...chan...

2 Sept 2009 Wednesday

Today Miss Azura gave us chapter 6 lecture, topic is telecommunication. Firstly, Miss Azura explained the definition telecommunication and telecommunication services. There are 10 kind of services which are leased line, private line, dedicated line, fixed line, WiMax, Digital Multimedia Broadcasting (DMB), Wi-Fi, Zigbee, Wibree and 3G (Third Generation). Secondly, Miss Azura talked about satellite communication. There are 3 categories of satellite which are Geosynchronous-Earth Orbit (GEO), Low-Earth Orbit (LEO) and Medium-Earth Orbit (MEO). Thirdly is types of satellite such as Anti-satellite weapons, Astronomical satellites, Biosatellites, Communications satellites, Miniaturized satellites, Navigational satellites, Reconnaissance satellites, Earth observation satellites, space stations, tether satellites and weather satellites. After lecture, Miss Azura settle problem of separate group and determine which group get which topic of presentation by drawing.



...chan...