Mobile Blog: Video, Media, Augmented Reality, Rich Media, IVVR

photo credit: *kaetzchen

Recently, I bought the HTC Touch Pro 2. As advertised by HTC, it is a professional communication tool. By upgrading it with Windows Mobile 6.5 its performance and functionality seemed boosted. A couple of days ago a friend of mine (he is not really into the mobile market, though) just bought the HTC HD2. Realizing the HD2 has double of processing power and double of RAM compared of my TP2, I quietly regret my decision. The HD2 is extremely fast, especially when browsing web pages. The only drawback of the HD2, and all touchphones, is the missing physical keyboard by nature. As I type a lot of emails on the go, sometimes blindly, I need a physical keyboard. But maybe Samsung solves this general problem with its Touchwiz UI? I think, HTC is about the turn the mobile phones market upside down. They are already very successful in the business sector. As they will start to market their products more to consumers for private and leisure use, they might rule out RIM and their blackberry; while wresting market share from Nokia and Samsung.

photo credit: phauly

In desktop video conferencing, the video conferencing application is normally bundled to an Instant Messaging software that includes text chat capabilities. Users can appoint or prearrange a video conference using textual chat. In contrast, the current evolution of video telephony in UMTS (Universal Mobile Telecommunications System) networks based on the circuit-switched 3G-324M service does not seamlessly combine video conferencing with other communication channels. The notion of video telephony in the mobile environment is nearer to standard voice calling than in the stationary world. Therefore, it is more likely that somebody will place a video call without prior announcement. This leads to privacy and inconvenience concerns. The callee might not want to be seen during a conversation for a variety reasons: A video call

photo credit: Iain Farrell

Even with a great deal of marketing, early attempts to convert users to the video telephony technology flopped (Jones and Marsden). In contrast, desktop video conferencing is incredibly popular for private person-to-person conversations and widely used for video conferencing in business environments such as telepresence for computer-supported cooperative work (CSCW).

In desktop video conferencing scenarios, typically a stationary computer is used. Camera and microphone are fixed and usually maintain the same distance from the person participating during the conversation. Moreover, lighting conditions are generally better than

Ganz einfach: Im Vergleich zur Festnetztelefonie m

photo credit: Steven Fernandez

Media compression, error concealment measures, and the characteristics of wireless networks have side effects on the quality of 3G video telephony and IVVR (Interactive Voice & Video Response) applications.

3G-324M requires only the use of speech codecs. In contrast to audio codecs, speech codecs are designed for speech transmission within a narrow frequency range, making them inappropriate for transmission of music or a range of artificial sounds. This fact needs to be considered when designing IVVR applications