TV Audio Signal Control for Speaker-Specific Tone Correction
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Solution Overview
Problem
The challenge is to provide a cost-effective solution for controlling the tone quality of external speaker units connected to television sets, as existing technologies fail to adapt to different speaker types, leading to inconsistent audio frequency characteristics and increased costs due to the need for tone quality controlling circuits.
Innovation Solution
An audio signal supplying device that identifies and adjusts the acoustic characteristics of the audio signal based on parameters specific to the connected speaker unit, using a system comprising a connection terminal, specifying section, acquiring section, storing section, inputting section, acoustic characteristic controlling section, and supplying section, which can acquire and store parameters for various speaker types, allowing for optimal sound emission without the need for expensive controlling circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tone quality controlling circuit is provided to correct frequency characteristics for different speaker units, then the sound quality can be improved, but the cost increases
Solution Approach 1:
The tone quality controlling circuit is extracted from the speaker unit and relocated to the television set. The television set now contains the frequency characteristic correction circuit that processes audio signals before sending them to external speaker units, eliminating the need for costly control circuits within each speaker unit while maintaining sound quality improvement.
Solution Approach 2:
The television set's audio signal processing circuit is designed to handle multiple types of external speaker units universally. By incorporating a specifying section that identifies speaker unit types and applies corresponding frequency characteristic corrections, the system can accommodate various speaker units (bookshelf speakers, floor-standing speakers, etc.) through a single multi-functional correction circuit in the television set.
2Device complexity
If the frequency characteristic correction is fixed for a specific speaker type, then the correction can be simplified, but the adaptability to different speaker units deteriorates
Solution Approach 1:
The frequency characteristic correction is made dynamic rather than fixed. The correcting section receives control signals based on the specified speaker unit type and adjusts the frequency characteristic correction accordingly. This allows the same correction circuit to adapt its parameters dynamically to match different speaker unit characteristics, maintaining simplicity while achieving versatility.
Solution Approach 2:
The system changes the correction parameters based on the identified speaker unit type. Different frequency characteristic correction values are applied depending on whether the connected unit is a bookshelf speaker, floor-standing speaker, or other types. This parameter adaptation enables a single correction circuit to handle multiple speaker types effectively.
3Reliability
If external speaker units are used to improve sound quality, then the tone quality can be enhanced, but the design freedom and layout flexibility are restricted
Solution Approach 1:
The tone quality control functionality is extracted from the speaker unit design and placed in the television set. This extraction allows external speaker units to be designed with complete freedom regarding their physical layout, size, and configuration, while the television set's correction circuit compensates for any frequency characteristic variations, maintaining both design freedom and tone quality enhancement.
Data Source
AI summary
An audio signal supplying device includes a connection terminal which is connected to a speaker unit and which outputs an audio signal to the speaker unit, a specifying section which specifies a type of the speaker unit connected to the connection terminal, an acquiring section which acquires a parameter corresponding to the type of the speaker unit specified by the specifying section from an outside, a storing section which stores the parameter acquired by the acquiring section, an inputting section into which the audio signal is input, an acoustic characteristic controlling section which adjusts an acoustic characteristic of the audio signal input into the inputting section based on the parameter stored in the storing section, and a supplying section which supplies the audio signal whose acoustic characteristic is adjusted by the acoustic characteristic controlling section to the connection terminal.