CN111082830B - Data loopback detection circuit of digital audio interface and digital audio equipment - Google Patents
Data loopback detection circuit of digital audio interface and digital audio equipment Download PDFInfo
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- CN111082830B CN111082830B CN201911380500.1A CN201911380500A CN111082830B CN 111082830 B CN111082830 B CN 111082830B CN 201911380500 A CN201911380500 A CN 201911380500A CN 111082830 B CN111082830 B CN 111082830B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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Abstract
The application discloses data loopback detection circuit and digital audio equipment of digital audio interface, this circuit include data input end, data output end, receiving channel circuit, send channel circuit, inside receiving terminal, inside output, first passageway selection circuit and control signal input. The data input end is in signal connection with the internal receiving end through a receiving channel circuit; the internal output end is in signal connection with the first input end of the channel selection circuit through the sending channel circuit; the second input end of the first channel selection circuit is in signal connection with the data input end, and the output end of the first channel selection circuit is in signal connection with the data output end; the control signal input end is in signal connection with the control end of the first channel selection circuit and is used for receiving a channel selection signal for selectively conducting the channel selection circuit. The transmission performance between the data input end and the data output end can be detected by conducting the second input end and the output end.
Description
Technical Field
The present invention relates to the field of digital circuit technology, and more particularly, to a data loopback detection circuit and a digital audio device for a digital audio interface.
Background
In devices for processing audio signals, a digital audio interface conforming to the I2S (integrated circuit built-in audio) standard is often used for connection between digital devices for bidirectional transmission of audio signals. For digital audio equipment, zero-error-rate transceiving of a digital audio interface is the basis for ensuring the normal operation of the digital audio interface, so that the transmission performance of the corresponding data interface needs to be detected so as to determine the transceiving quality of the digital audio interface.
Disclosure of Invention
In view of this, the present application provides a data loopback detection circuit of a digital audio interface and a digital audio device, which are used to detect the transmission performance of the digital audio interface.
In order to achieve the above object, the following solutions are proposed:
the utility model provides a data loopback detection circuitry of digital audio interface, is applied to digital audio equipment, includes data input end, data output end, receiving channel circuit, transmitting channel circuit, inside receiving terminal, inside output, first passageway selection circuit and control signal input, wherein:
the data input end is in signal connection with the internal receiving end through the receiving channel circuit;
the internal output end is in signal connection with a first input end of the first channel selection circuit through the sending channel circuit;
the second input end of the first channel selection circuit is in signal connection with the data input end, and the output end of the first channel selection circuit is in signal connection with the data output end;
the control signal input end is in signal connection with the control end of the first channel selection circuit, and is used for receiving a channel selection signal for selectively conducting the first channel selection circuit and sending the channel selection signal to the control end of the first channel selection circuit.
Optionally, the output terminal of the first channel selection circuit is configured to be conducted with the second input terminal thereof.
Optionally, the first channel selection circuit further includes a third input end, and the third input end is in signal connection with the internal receiving end.
Optionally, the output terminal of the first channel selection circuit is configured to be conducted with the third input terminal thereof.
Optionally, the apparatus further includes a second channel selection circuit, wherein:
the second channel selection circuit is provided with an output end, a fourth input end and a fifth input end, the fourth input end is in signal connection with the internal output end, the fifth input end is in signal connection with the internal receiving end, the output end of the second channel selection circuit is in signal connection with the sending channel circuit, and the control end of the second channel selection circuit is in signal connection with the control signal input end.
Optionally, the output terminal of the first channel selection circuit is configured to be conducted with the first input terminal of the first channel selection circuit, and meanwhile, the output terminal of the second channel selection circuit is configured to be conducted with the fifth input terminal of the second channel selection circuit.
Optionally, the output terminal of the first channel selection circuit is configured to be conducted with the first input terminal of the first channel selection circuit, and meanwhile, the output terminal of the second channel selection circuit is configured to be conducted with the fourth input terminal of the second channel selection circuit.
A digital audio device is provided with the data loopback detection circuit.
According to the above technical solution, the present application discloses a data loopback detection circuit of a digital audio interface and a digital audio device, where the circuit includes a data input terminal, a data output terminal, a receiving channel circuit, a sending channel circuit, an internal receiving terminal, an internal output terminal, a first channel selection circuit, and a control signal input terminal. The data input end is in signal connection with the internal receiving end through a receiving channel circuit; the internal output end is in signal connection with the first input end of the channel selection circuit through the sending channel circuit; the second input end of the first channel selection circuit is in signal connection with the data input end, and the output end of the first channel selection circuit is in signal connection with the data output end; the control signal input end is in signal connection with the control end of the first channel selection circuit and is used for receiving a channel selection signal for selectively conducting the channel selection circuit. The transmission performance between the data input end and the data output end can be detected by conducting the second input end and the output end.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a data loopback detection circuit of a digital audio interface according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a data loopback detection circuit of another digital audio interface according to an embodiment of the present application;
fig. 3 is a circuit diagram of a data loopback detection circuit of another digital audio interface according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
Fig. 1 is a schematic circuit diagram of a data loopback detection circuit of a digital audio interface according to an embodiment of the present application.
As shown in fig. 1, the data loopback detection circuit provided by the present embodiment includes a data input terminal 10, a data output terminal 20, a receiving channel circuit 30, a transmitting channel circuit 40, an internal receiving terminal 50, an internal output terminal 60, a first channel selection circuit 70 and a control signal input terminal 80. Wherein the first channel selection circuit comprises an output, a first input 71 and a second input 72.
In the above components, two ends of the receiving channel circuit are respectively connected to the data input end and the internal receiving end, that is, the data signal input from the data input end can reach the internal receiving end through the receiving channel circuit and is output to the corresponding back end circuit (not shown in fig. 1) through the internal receiving end;
two ends of the sending channel circuit are respectively in signal connection with the internal output end and the first input end of the first channel selection circuit, namely, a signal output by the back end circuit can reach the first input end of the first channel selection circuit through the sending channel circuit; and the second input end of the first channel selection circuit is in signal connection with the data input end, and the output end of the first channel selection circuit is in signal connection with the data output end of the data loopback detection circuit.
The control signal input end is in signal connection with the control end of the first channel selection circuit and is used for providing the received channel selection signal to the control end of the first channel selection circuit, and the channel selection signal is used for controlling the conduction of the output end of the first channel selection circuit with the first input end or the second input end.
When the communication between the data input end and the data output end of the data loopback detection circuit needs to be detected, the second input end of the first channel selection circuit can be configured to be conducted with the output end of the first channel selection circuit through a channel selection signal, and the signal can be directly looped back to the data output end, namely, the detection of the data input end and the data output end is realized through near-end loopback.
It can be seen from the above technical solutions that, this embodiment provides a data loopback detection circuit of a digital audio interface, which is applied to a digital audio device and includes a data input terminal, a data output terminal, a receiving channel circuit, a sending channel circuit, an internal receiving terminal, an internal output terminal, a first channel selection circuit, and a control signal input terminal. The data input end is in signal connection with the internal receiving end through a receiving channel circuit; the internal output end is in signal connection with the first input end of the channel selection circuit through the sending channel circuit; the second input end of the first channel selection circuit is in signal connection with the data input end, and the output end of the first channel selection circuit is in signal connection with the data output end; the control signal input end is in signal connection with the control end of the first channel selection circuit and is used for receiving a channel selection signal for selectively conducting the channel selection circuit. The transmission performance between the data input end and the data output end can be detected by conducting the second input end and the output end.
Example two
Fig. 2 is a circuit diagram of a data loopback detection circuit of another digital audio interface according to an embodiment of the present application.
As shown in fig. 2, the data loopback detection circuit provided by the present embodiment includes a data input terminal 10, a data output terminal 20, a receiving channel circuit 30, a transmitting channel circuit 40, an internal receiving terminal 50, an internal output terminal 60, a first channel selection circuit 70 and a control signal input terminal 80. Wherein the first channel selection circuit comprises an output, a first input 71, a second input 72 and a third input 73.
In each unit, two ends of the receiving channel circuit are respectively connected with the data input end and the internal receiving end, namely, the data signal input from the data input end can reach the internal receiving end through the receiving channel circuit and the internal receiving end is output to the corresponding back end circuit; further, the third input terminal 73 is signal-connected to one end (the end connected to the internal receiving terminal 50) of the receiving channel circuit 30.
Two ends of the sending channel circuit are respectively in signal connection with the internal output end and the first input end of the first channel selection circuit, namely, a signal output by the back end circuit can reach the first input end of the first channel selection circuit through the sending channel circuit; the second input end of the first channel selection circuit is in signal connection with the data input end, and the output end of the first channel selection circuit is in signal connection with the data output end; and the third input end of the first channel selection circuit is in signal connection with the internal receiving end.
The control signal input end is in signal connection with the control end of the first channel selection circuit and is used for providing a channel selection signal for the control end of the first channel selection circuit, and the channel selection signal is used for controlling the input end of the first channel selection circuit to be conducted with the first input end, the second input end or the third input end.
When the receiving channel circuit of the data loopback detection circuit needs to be detected, the third input end of the first channel selection circuit can be directly conducted with the output end of the first channel selection circuit, and a signal can loop back to the data output end, so that the detection of the data input end and the data output end is realized.
EXAMPLE III
Fig. 3 is a circuit diagram of a data loopback detection circuit of another digital audio interface according to an embodiment of the present application.
As shown in fig. 3, the data loopback detection circuit provided by the present embodiment includes a data input terminal 10, a data output terminal 20, a receiving channel circuit 30, a sending channel circuit 40, an internal receiving terminal 50, an internal output terminal 60, a first channel selection circuit 70, a second channel selection circuit 90 and a control signal input terminal 80.
Wherein the first channel selection circuit 70 comprises a first output, a first input 71 and a second input 72; the second channel selection circuit 91 comprises a second output and a fourth input 91 and a fifth input 92.
In each unit, two ends of the receiving channel circuit are respectively connected with the data input end and the internal receiving end, namely, the data signal input from the data input end can reach the internal receiving end through the receiving channel circuit and the internal receiving end is output to the corresponding back end circuit;
two ends of the sending channel circuit are respectively in signal connection with the second output end of the second channel selection circuit and the first input end of the first channel selection circuit, namely, the signal output by the second channel selection circuit can reach the first input end of the first channel selection circuit through the sending channel circuit; and the second input end of the first channel selection circuit is in signal connection with the data input end, and the first output end of the first channel selection circuit is in signal connection with the data output end.
The control signal input end is in signal connection with the control end of the first channel selection circuit and is used for enabling the channel selection signal to be used for controlling the input end of the first channel selection circuit to be conducted with the first input end or the second input end.
The control signal input end is also in signal connection with the control end of the second channel selection circuit and is used for outputting the received channel selection signal to the control end. The output end of the second channel selection circuit is in signal connection with the sending channel circuit, the fourth input end is in signal connection with the internal output end, and the fifth input end is in signal connection with the internal receiving end.
When the receiving channel circuit and the sending channel circuit need to be detected, the first input end of the first channel selection circuit can be configured to be conducted with the output end (first output end) thereof through a channel selection signal, and the fifth input end of the second channel selection circuit is conducted with the output end (second output end) thereof, so that the receiving channel circuit and the sending channel circuit are detected by signals input from the data input end in a far-end loop returning mode.
In addition, the output end of the first channel selection circuit can be conducted with the first input end of the first channel selection circuit, and the second output end of the second channel selection circuit can be conducted with the fourth input end of the second channel selection circuit, so that the output mode is realized.
Example four
The present embodiment provides a digital audio device, wherein a digital audio interface of the digital audio device is connected with the data loopback detection circuit provided in any of the above embodiments.
The data loopback detection circuit comprises a data input end, a data output end, a receiving channel circuit, a sending channel circuit, an internal receiving end, an internal output end, a first channel selection circuit and a control signal input end. The data input end is in signal connection with the internal receiving end through a receiving channel circuit; the internal output end is in signal connection with the first input end of the channel selection circuit through the sending channel circuit; the second input end of the first channel selection circuit is in signal connection with the data input end, and the output end of the first channel selection circuit is in signal connection with the data output end; the control signal input end is in signal connection with the control end of the first channel selection circuit and is used for receiving a channel selection signal for selectively conducting the channel selection circuit. The transmission performance between the data input end and the data output end can be detected by conducting the second input end and the output end.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The technical solutions provided by the present application are introduced in detail, and specific examples are applied in the description to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (7)
1. The utility model provides a data loopback detection circuitry of digital audio interface which characterized in that is applied to digital audio equipment, detection circuitry includes data input end, data output end, receiving channel circuit, sending channel circuit, inside receiving terminal, inside output, first passageway selection circuit, second passageway selection circuit and control signal input, wherein:
the data input end is in signal connection with the internal receiving end through the receiving channel circuit;
the internal output end is in signal connection with a first input end of the first channel selection circuit through the sending channel circuit;
the second input end of the first channel selection circuit is in signal connection with the data input end, and the output end of the first channel selection circuit is in signal connection with the data output end;
the second channel selection circuit is provided with an output end, a fourth input end and a fifth input end, the fourth input end is in signal connection with the internal output end, the fifth input end is in signal connection with the internal receiving end, the output end of the second channel selection circuit is in signal connection with the sending channel circuit, and the control end of the second channel selection circuit is in signal connection with the control signal input end;
the control signal input end is in signal connection with the control end of the first channel selection circuit, and is used for receiving a channel selection signal for selectively conducting the first channel selection circuit and sending the channel selection signal to the control end of the first channel selection circuit.
2. The data loopback detection circuit of claim 1, wherein an output of the first channel selection circuit is configured to be conductive with a second input thereof.
3. The data loopback detection circuit of claim 1, wherein the first channel selection circuit further comprises a third input terminal in signal connection with the internal receiving terminal.
4. The data loopback detection circuit of claim 3, wherein an output of the first channel selection circuit is configured to be conductive with a third input thereof.
5. The data loopback detection circuit of claim 1, wherein an output of the first channel selection circuit is configured to be conductive with a first input of the first channel selection circuit while an output of the second channel selection circuit is configured to be conductive with a fifth input of the second channel selection circuit.
6. The data loopback detection circuit of claim 1, wherein an output of the first channel selection circuit is configured to be conductive with a first input of the first channel selection circuit while an output of the second channel selection circuit is configured to be conductive with a fourth input of the second channel selection circuit.
7. A digital audio device provided with a data loop back detection circuit as claimed in any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911380500.1A CN111082830B (en) | 2019-12-27 | 2019-12-27 | Data loopback detection circuit of digital audio interface and digital audio equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911380500.1A CN111082830B (en) | 2019-12-27 | 2019-12-27 | Data loopback detection circuit of digital audio interface and digital audio equipment |
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| CN111082830A CN111082830A (en) | 2020-04-28 |
| CN111082830B true CN111082830B (en) | 2021-08-27 |
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| CN101609676A (en) * | 2008-06-19 | 2009-12-23 | 美国博通公司 | A kind of method and system of audio signal |
| CN102291667A (en) * | 2011-04-29 | 2011-12-21 | 广州视源电子科技有限公司 | Automatic selection test method and test system for digital and analog audios |
| CN103813162B (en) * | 2013-11-07 | 2015-07-08 | 天津三星电子有限公司 | Television mainboard self-detection method and system |
| CN104822110B (en) * | 2015-04-20 | 2018-09-04 | 青岛歌尔声学科技有限公司 | A kind of Multi-audio-frequency channel control switching circuit and audio frequency apparatus |
| CN109348363A (en) * | 2018-08-31 | 2019-02-15 | 西安中兴新软件有限责任公司 | A kind of audio-frequency detection and device, storage medium |
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