Expert computing advice (Part 4)

4/20/2012 5:31:57 PM

Wireless HDMI Kit

Q: I am thinking of buying a wireless HDMI kit, but is there a standard for this technology?

A: Unfortunately, there are some competitive standards. Some use sole form of Wi-Fi to send video from the room, but they often compress movie before sending it. This may lead to reduced quality when there are many moves on the screen. You can find unsmooth replay or cubic artifacts there.

Another main system is Ultra Wideband (UWB). It has shorter range than Wi-Fi but has much larger data throughput. It allows video Full HD such as Blu-ray to be transferred without compression. However, transmitter and receiver usually need straight and uninterrupted vision to work well.

Description: Wireless HDMI Kit

Some kits provide HDMI port on transmitter and receiver so that it can be used with any product, but others have USB dongle as a transmitter, which means they can only be used to send video and audio from laptop or PC.

Replace ADSL router


Q: I have ADSL internet connection, and need to replace router, but the model I want does not have modem ADSL. What is the best way to connect it to the internet?

A: Modem that is not ADSL we mentioned is a cable modem that has an Ethernet WAN port instead of ADSL port. To make router connect to the internet, you need to plug it into the ADSL modem with Ethernet port or ADSL router. ADSL modems with Ethernet ports are very scarce; you had better use cheap wireless ADSL router as a modem. Most ISPs provide a free one, but TP-Link TD-W8951ND ‘s price is $45 from

Description: TP-Link TD-W8951ND

It is not important no matter what standard it uses – just make sure it supports PPPoA and ADSL2+. Set up ADSL router to connect to your internet connection, and plug it into cable router’s WAN port with an Ethernet cable. Go to ADSL router’s setting, check whether DHCP has alreally opened, and disable wireless connection and firewall. This makes sure it does not cause interference with cable router’s wireless, and you only have to configure firewall on cable router for services such as playing game online.

What is XQD memory card?

XQD is the inheritor of CompactFlash, and has been launched recently by CompactFlash Association. Unlike SDXC and SDHC cards, which keep similar sizes and shapes to the old SD cards, XQD will use a completely new design. XQD has the thickness nearly equal to CompactFlash, but the new cards will be narrower and shorter, so they look like SD card more than current CompactFlash card.

CompactFlash Association announces XQD would be dramatically faster than CompactFlash or SD card since it would be based on PCI Express interface in stead of the old PCMCIA interface used in CompactFlash. We still have to wait to see whether camera producers accept XQD or not.

Choose camcorder

Follow these steps to find your ideal specs:

Sensor: 1/6-inch CMOS

Zoom: 10x optical

Port: HDMI and USB

Screen: colored LCD

Storage form: flash memory

Accessory: remote control

The folowings are only recommened minimum specs:

1.    If you want to shoot basic family videos, you should buy a camcorder using basic flash memory with the price of approximate $220. It will create good results in almost all light conditions. Test battery life, it is good when lasting 90+ mins.

2.    Most camcorders are specified as HD, but this is not an instant promise of image quality. You had better skip the number of pixels the sensor has, and focus on its main size. The smallest sensor’s size is usually 1/6 inches, and increases gradually to about 1/2 inches. Larger sensor improves image quality and allows you to shoot the footage better in weak light condition. Another choice often used by Panasonic is a camcorder using three small sensors in stead of one large sensor to create excellent image quality.

Description: JVC

3.    Most camcorders base on the flash memory or memory card to save video. Many producers create a series of nearly similar models although more expensive models have preset flash memories. In general, it costs less to buy a version that only has camcorder’s memory card and a few 16GB memory cards than to invest in a model with preset flash memory. Camcorders using hard drive and DVD are outdated, and certainly will no longer be produced.

4.    If you are shooting something more important than a familiy holiday, you will want more features. A good manual focus allows more flexible shooting while flash base and microphone input allow using external microphone, which improves sound quality so much.

Description: Tripod

5.    If you are really serious about making video, buying a few more accessories will create distinction for the last video. Tripod will bring you better results than spending much on large sensor. Standby battery is essential to shoot long, and some video adjustment apps will help you create more impressive results.
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