PSTN speech and IP video visible telephone having embedded browser

Abstract

The present invention discloses a PSTN voice and IP video visible telephone device with built-in browser, whose audio and video are respectively transmitted by the PSTN network and IP network. The visible telephone device not only has all functions of the PSTN phone, but also has video communication, remote monitoring, multimedia messages, MMS transmitting and receiving, graphic / audio and video broadcast and Web browsing, and other functions. The visible telephone device has structural features that the device is composed of a PSTN audio processing part and an IP multimedia signal processing part, the voice is separately transmitted by PSTN, and a main control system is composed of a digital media processor DM642, a keyboard / telephone event single-chip EM78806 and an interface control single-chip MC9S12UF32. The single-chip MC9S12UF32 controls the keyboard / telephone event single-chip EM78806 through the serial port, and is connected to the DM642 the HPI interface of the DM642 for exchanging information, wherein, a complex programmable logic device XC9536 provides a time sequence. The operating system is a real-time operating system based on DSP BIOS, the built-in browser and other application programs are developed and operated on the real-time operating system.

Description

Technical field [0001] The present invention relates to an interactive phone with an embedded browser that transmits voice through PSTN (Public Switched Telephone Network, public switched telephone network), transmits video images of callers through IP network and can send, receive and play other multimedia information. functional videophone. Background technique [0002] Existing videophones are generally realized based on IP network or telephone network PSTN, and are called IP videophone and PSTN videophone respectively. The former transmits audio and video signals through the IP network and the latter through the PSTN. The feature is that audio and video signals are transmitted through one network; there is also a product that integrates IP videophone and PSTN voice telephone, which can transmit audio and video through IP network or audio through PSTN respectively, using IP network Video calls can be realized at any time, which is equivalent to the simple addition of IP ...

AI Technical Summary

Problems solved by technology

In terms of video compression, the cutting-edge technology is H.264, using this protocol to compress video, but if PSTN or IP network is used to transmit audio and video at the same time, the practice has proved that the problem remains: PSTN videophone image quality is poor, IP videophone Voice quality is not high

Especially during video calls, if it is also required to display graphics, text, and video advertisements on the same screen, it is impossible on PSTN video phones, and the effect is not ideal on IP video phones.

That is to say, if one network is used to transmit two kinds of signals, it cannot achieve a good restoration effect of sound and image, let alone transmit and play graphic and video information during a call.

Existing videophones fail to enter families on a large scale due to voice or image quality, or shortcomings in terms of convenience and high price.

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