81003-438-51-R 80190-220-01-R SCR组件 替换零件套

• 具备支持连续媒体的文件系统，可对包含有活动图像和声音的标准文件格式进行操作；
• 包含图像和声音数据同步所需的同步控制机制；
• 为满足系统存储空间和对媒体响应的要求，具备对声像数据进行压缩和还原的能力；
• 标准化的，对硬件透明的应用程序接口API；
• 友好的、具有图形功能和声像功能的用户接口。

81003-438-51-R 80190-220-01-R

Audio communication terminal is the most widely used communication terminal in the communication system, it can be used in the common telephone switching network PSTN analog telephone, recording telephone, coin telephone, magnetic card telephone, IC card telephone, also can be used in ISDN network digital telephone and wireless mobile phone used in the mobile communication network.
Generally speaking, a telephone with the most basic functions is composed of a call module, a number module, a ringing module and a line interface. At present, most telephones are push-button telephones, whose number issuing module mainly includes key dial, dual audio signal/pulse signal generator. The ringer module is composed of a tonal ringer circuit, a piezoelectric ceramic ringer, or a loudspeaker. It detects the signal status on the telephone line in the standby state and drives the piezoelectric ceramic ringer or a loudspeaker to emit a ringing tone when a ringing signal is received from the telephone exchange. The communication module consists of a receiver composed of electrical/acoustic components, a transmitter composed of acoustic/electrical conversion components and a signal amplifier. Its function is to complete the acoustic and electrical transformation and signal amplification of the speech signal when sending a speech, as well as the amplification of the received signal and the electroacoustic transformation of the speech signal.
Multimedia communication terminal not only needs strong hardware support, but also needs the corresponding software support. Only on the basis of the full combination of the two can the terminal effectively play a variety of multimedia functions. Multimedia communication terminal software system is composed of multimedia operating system and multimedia communication application software for different applications.
Multimedia operating systems generally need to solve the following key problems:
A file system that supports continuous media to operate on standard file formats containing moving images and sound;
Includes the synchronization control mechanism required for image and sound data synchronization;
In order to meet the requirements of storage space and media response, it has the ability to compress and restore audio and video data.
Standardized, hardware-transparent application program interface apis;
Friendly user interface with graphics and audio and video functions.