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Building type wireless message leaving door bell based on ADPCM voice compression code

A compression coding, building-type technology, applied in two-party line system stations, advanced technology, automatic call answering/message recording/call recording, etc., can solve the problem of not being able to store messages, achieve fast control response speed, and simplify installation work , the effect of convenient installation

Inactive Publication Date: 2009-05-06
海安江理工技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The existing building-type doorbells are basically wired transmission systems, and cannot store messages

Method used

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  • Building type wireless message leaving door bell based on ADPCM voice compression code
  • Building type wireless message leaving door bell based on ADPCM voice compression code
  • Building type wireless message leaving door bell based on ADPCM voice compression code

Examples

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Embodiment Construction

[0024] A preferred implementation example of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0025] Such as figure 1 As shown, the building-type wireless message doorbell based on the ADPCM voice compression coding algorithm includes a main controller 1 and a group of user terminals 2, and the main controller 1 and user terminals 2 exchange and transmit voice signals in a wireless manner , using the wireless point-to-multipoint handshake protocol to form a wireless voice signal transmission network; the user terminal 2 has a storage function, and the codec of the voice signal is efficient and high-quality. All user terminals 2 in the building are centered on the main controller 1 installed on the access control system, and constitute the whole system by wireless. The main controller 1 and the user terminal 2 are usually in a low power consumption state, and their sleep and working time are controlled by a timer independent o...

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Abstract

The invention is based on the ADPCM voice compression coding algorithm building wireless doorbell message. It includes a main controller and a set of user terminals using point-to-multipoint wireless handshake agreement to form a wireless network of voice signal transmission. Can be used for residential quarters, office buildings, such as Access Control Systems. User terminals in a normal low-power sleep state, when the caller sent through the host controller when the call signal in response to the user terminals have been wake-up call, lights flashing, music bell rings if the response to pressing the button to answer and host controller to engage in dialogue to establish a connection; if nobody answer, call may choose whether or not messages.

Description

technical field [0001] The invention relates to the fields of information transmission and wireless communication, in particular to a building-type wireless message doorbell based on an ADPCM voice compression coding algorithm. Background technique [0002] Existing building-type doorbells are basically wired transmission systems, and cannot store messages. [0003] ADPCM voice compression coding algorithm is an adaptive differential pulse code modulation algorithm. The algorithm takes advantage of the correlation between the sampling points of the speech signal, and uses adaptive prediction and adaptive quantization for the non-stationary characteristics of the speech signal, which has the characteristics of high efficiency and high quality. [0004] The building-type wireless message doorbell is a point-to-multipoint wireless voice signal transmission system, which adopts the wireless handshake communication protocol, and can choose whether to store messages. Contents o...

Claims

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Application Information

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IPC IPC(8): H04M1/64H04Q5/24
CPCY02D30/70
Inventor 张雪凡姜鹏
Owner 海安江理工技术转移中心有限公司
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