Technology editor Darren Waters of the BBC News website has been filming a series of reports with a mobile phone on the US west coast.

He used a Nokia N95 at the Game Developers Conference and travelled around Silicon Valley to meet some of the world's leading technology innovators.

1. Video equipment 3. Translation tool 5. Phone visionaries 7. Brainwave game 9. Motion mobile 11. Powerful phone graphics

2. Google Android 4. Camera-phone locator 6. Traffic jam prevention 8. Nokia mobile gaming 10. 3D video gaming 12. Halo engineer

Mobile reporting

Before travelling to California Darren tested out a range of filming equipment.

While the Nokia N95 mobile phone does not produce as good quality material as professional kit does, its versatility is a big bonus.

Android demo

Google is hoping to make big in-roads into the mobile industry by creating its own operating system - Android.

Andy Rubin, the man behind Android, plays games and surfs the web ahead of the software's release.

Chinese translation

Until recently cameras on phones have only been used for taking photos and making videos.

The latest technology enables them to view foreign words and characters then translate them into another language.

Location software

Phones are now being programmed to recognise locations through cameras.

A landmark can trigger it to search a database to give information about an area, such as local history or nearby toilets.

Mobile predictions

Nokia's vision for mobiles includes phones that analyse your lunch and change colour to match your clothes.

The mobile giant believes nanotechnology will lead to mobiles you can wrap around your wrist.

Road communication

Developers are working towards phones that constantly update one another on traffic conditions.

Engineers have designed a system whereby mobiles along a road tell one another the speed they are travelling.

Brain-controlled game

US/Australian firm Emotiv has invented a neuro-monitor which interprets brain activity.

The Epoc headset lets players control action in a game with thoughts and emotions, for instance making an angry face to attack foes.

Nokia games boss

Nokia's N-Gage gaming platform is designed for the company's N-series mobile phones.

Nokia's head of games says the firm has learned lessons from the lacklustre response to the platform's original launch.

Movement phone

The Nintendo Wii's motion-sensitive controller concept has been translated to the mobile phone.

Gesturetek's Vincent John Vincent demonstrates a handset that interprets movement for gaming.

3D video gaming

Graphics giant Nvidia has developed technology that allows gamers to be immersed in a 3-dimensional world.

Software drivers split the video output into two images which must be viewed through customised glasses.

Mobile graphics

Many handsets now have the power to deliver high performance graphics.

David Harold of Imagination Technologies compares the graphics performance of some mobiles to that of the Sony PSP and PS3.

Bungie engineer

Games developer Bungie is looking beyond the phenomenal success of the Halo series for the Xbox.

Last October it announced its separation from Microsoft and engineering lead Chris Butcher is promising a new direction.