Unlock instant, AI-driven research and patent intelligence for your innovation.

Audio reproducing equipment and method

A technology of audio reproduction and equipment, applied in the direction of electrical components, stereo circuit arrangement, speaker distribution signal, etc., can solve problems such as uneconomical audio power amplifier power supply

Inactive Publication Date: 2006-11-08
THOMSON LICENSING SA
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional systems uneconomically power audio power amplifiers that are not used at all in a certain mode of operation, and / or provide the same power to amplifiers in each mode regardless of output power requirements as a function of the selected mode. Power Supply and Bias Levels

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Audio reproducing equipment and method
  • Audio reproducing equipment and method
  • Audio reproducing equipment and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Referring to FIG. 1 , an exemplary home entertainment system 20 is generally provided in a cabinet 22 having built-in audio speakers such as a center speaker 26 and left and right stereo speakers 24 , 25 . The entertainment system 20 preferably includes the ability to drive additional speakers 32 , 42 external to the enclosure 22 . For surround sound audio mode, the box speakers 24, 25 (and optionally 26) are supplemented by rear speakers 32 located behind an area 40, which is generally occupied by the user and audience. The user preferably has the option of additionally using external front speakers 27 , 28 which either supplement or replace the speakers 24 , 25 provided in cabinet 22 .

[0018] Speakers provided in an entertainment system are typically grouped in left-to-right and front-to-rear categories and are controlled by a control unit (not shown) which causes the outputs of the speakers to be balanced according to user preference. Normally, the balance control...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An audio system has a plurality of amplifiers (52, 56), each amplifier having a power input (Vcc, pin 3), an audio input (pins 7, 11) and an output (pins 4 and 2) for driving the audio speaker (27, 28, 32) in a selected one of at least two modes of operation between which the selection of the audio speaker and / or the required power output of the audio speaker is different of. The invention can be used, for example, in entertainment systems having internal and external speakers and associated amplifiers that switch between stereo and surround sound modes. providing at least two different supply voltage sources (34V, 24V) to the amplifier, and manipulating the switching unit (Q1, D2) when switching between modes to connect one or the other of the different supply voltage sources to the at least two The power supply input of the corresponding amplifier in the amplifier. This prevents an increase in the total audio output of the system, for example when switching from two stereo outputs to five surround outputs.

Description

technical field [0001] The present invention relates to audio reproduction systems. In particular, the invention relates to audio systems capable of switching between modes of selectively activating more or less audio amplifiers, eg for switching between stereo mode and surround mode. Background of the invention [0002] It is well known that switching amplifiers between alternative supply voltages is useful in some situations, and it is undoubtedly beneficial for cutting off supply voltages to components not in use to avoid unnecessary power dissipation and heat generation. For example, the TDA 7294G class of power amplifiers from SGS Thomson Microelectronics is specific to dual bipolar supply voltages. Relatively small positive and negative supply voltages are typically connected to the amplifier's power output stage. When the input voltage exceeds a certain threshold, a higher power supply voltage is automatically switched to replace a smaller voltage. This accommodate...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04S1/00H04S7/00H04R5/04H03F3/68H04R3/12H04S3/00H04S5/02
CPCH04R5/04H04R2420/03H04S1/00H04S3/00
Inventor A·A·霍弗M·R·安德森
Owner THOMSON LICENSING SA