JP2022073476A - Audio processing device - Google Patents

Abstract

To resolve a problem of audio not being output by an enhanced audio return channel (eARC), in an audio processing device that has an eARC function of outputting an audio signal input from a sink device such as a television to a loudspeaker.SOLUTION: An AV receiver 1 has an eARC function of outputting an audio signal input from a television 100 to a loudspeaker 200. A controller 2 of the AV receiver 1 executes a low-high operation of setting a power supply line connected with the television 100 to be at a low level for a predetermined time period and then setting to be at a high level. In a case where the low-high operation is executed, the controller 2, if a hot plug of the television 100 is not changed from the low level to the high level, changes the predetermined time and then executes the low-high operation.SELECTED DRAWING: Figure 2

Description

The present invention relates to a voice processing device that performs voice processing such as amplification on a voice signal.

As an audio processing device that performs audio processing such as amplification of an audio signal, there is an AV receiver having an ARC (Audio Return Channel) function that outputs an audio signal input from a sink device such as a television to a speaker (for example, Patent Document 1). reference.). The television and the AV receiver are connected by an HDMI® cable. In addition, a digital audio signal is input to the AV receiver from the television via an HDMI (registered trademark) cable. The AV receiver D / A-converts a digital audio signal into an analog audio signal and outputs it to a speaker.

In addition, the eARC (enhanced Audio Return Channel) function has been newly added from HDMI (registered trademark) Ver2.1. eARC is a standard that enables transmission of HBR Audio and Multi-ch PCM with respect to conventional ARC (see FIG. 3). In FIG. 3, HDMI (registered trademark) is described as "HD" for convenience.

Repeater devices such as AV receivers that support the HDMI (registered trademark) standard are eARC when the hot plug of sink devices such as TVs that support the HDMI (registered trademark) standard changes from low level to high level. Executes the discovery operation (initial connection sequence) of. Then, when the repeater device and the sink device recognize each other as an eARC compatible device, the audio output by the eARC is started.

Also, when executing the discovery operation from the repeater device itself instead of waiting for the hot-plug change of the sink device (for example, when changing the on / off setting of the eARC function), the HDMI (registered trademark) TX power line (for example) 5V) is once changed from low level to high level. As a result, the hot-plug of the sink device is changed to execute the eARC discovery operation. However, if the low level period of the power supply line (5V) is short, the hot plug may not be changed depending on the sink device. In this case, there may be a problem that the discovery operation is not executed and the sound by eARC is not output.

For example, if the period for lowering the power line (5V) is set to "a" msec, there is no problem with the "A" TV because the hot swap changes, but with the "B" TV. , There may be a problem that the hot plug does not change and the sound by eARC is not output. Therefore, by changing the above-mentioned low-level period to "b" (> "a") msec, the problem in the "B" television can be solved.

Japanese Unexamined Patent Publication No. 2011-199693

In the future, with the spread of HDMI (registered trademark) Ver2.1 compatible devices, it is expected that many eARC compatible TVs will be released in the market. However, by setting the above low level period to "b" msec, there is no guarantee that all televisions will operate without problems, and in that case, there may be a problem that audio by eARC is not output.

An object of the present invention is to solve a problem that audio by eARC is not output in an audio processing device having an eARC function that outputs an audio signal input from a sink device such as a television to a speaker.

The voice processing device of the first invention is a voice processing device having an eARC function for outputting a voice signal input from a sink device to a speaker, comprising a control unit, and the control unit is connected to the sink device. When the hot plug of the sink device changes from the low level to the high level when the low-high operation of the high level is executed after the power supply line is set to the low level for a predetermined time and the low-high operation is executed. When the discovery operation of the eARC function is executed and the low-high operation is executed and the hot plug of the sink device does not change from the low level to the high level, the predetermined time is changed and the low-high operation is performed. It is characterized by performing an operation.

In the present invention, when the control unit performs a low-high operation of setting the power line connected to the sink device to a low level for a predetermined time and then setting it to a high level, the hot plug of the sink device is changed from low level to high. When the level does not change, a predetermined time is changed (for example, increased) to perform a low-high operation. As a result, for example, even if the hot plug does not change for a predetermined time during the low level of the power supply line, there is a high possibility that the hot plug will change due to the low level after the change. Therefore, it is possible to solve the problem that the sound by eARC is not output.

The voice processing device of the second invention is the voice processing device of the first invention. When the control unit executes the low-high operation, the hot plug of the sink device changes from low level to high level. When not, the operation of changing the predetermined time and executing the low-high operation is executed until the hot plug of the sink device changes from the low level to the high level.

The voice processing device of the third invention is the voice processing device of the first or second invention, and when the control unit executes the low-high operation, the hot plug of the sink device is changed from low level to high level. When it does not change to, the predetermined time is increased to perform the low-high operation.

The voice processing device of the fourth invention is the voice processing device according to any one of the first to third inventions, in which the control unit executes the discovery operation of the eARC function, and the sink device becomes the eARC function. When it recognizes that it is compatible, it is characterized by outputting sound from the speaker.

According to the present invention, it is possible to solve the problem that the sound by eARC is not output.

It is a block diagram which shows the structure of the AV receiver which concerns on embodiment of this invention. It is a flowchart which shows the processing operation of the AV receiver. It is a figure for demonstrating the outline of eARC.

Hereinafter, embodiments of the present invention will be described. FIG. 1 is a block diagram showing a configuration of an AV receiver according to the present embodiment. The AV receiver 1 (sound processing device, repeater device) is connected to the television 100 (sink device) by an HDMI (registered trademark) cable. The AV receiver 1 has an eARC (enhanced Audio Return Channel) function that outputs an audio signal input from the television 100 to the speaker 200. Further, the AV receiver 1 has a function of performing communication in accordance with the CEC (Consumer Electronics Control) standard.

As shown in FIG. 1, the AV receiver 1 includes a control unit 2, a storage unit 3, a display unit 4, an operation unit 5, a digital signal input terminal 6, a DIR (Digital Interface Receiver) 7, a DSP (Digital Signal Processor) 8, and the like. It includes a D / A converter (hereinafter referred to as "DAC") 9, a volume adjusting unit 10, an amplification unit 11, and a speaker terminal 12.

The control unit 2 controls each unit constituting the AV receiver 1 according to the program stored in the storage unit 3. The storage unit 3 is composed of a RAM (Random Access Memory) that functions as the main memory of the control unit 2 and a ROM (Read Only Memory) that stores a program. The storage unit 3 is not limited to the illustrated configuration, and may include a flash memory, an HDD (Hard Disk Drive), or the like.

The display unit 4 displays a setting screen or the like, and is an LCD (liquid crystal display), a fluorescent display tube, or the like. The operation unit 5 is for receiving a user operation, and is an operation button or a remote controller provided in the housing of the AV receiver 1. The user can instruct, for example, the volume value of the audio signal by operating the operation unit 5.

A television 100 is connected to the digital signal input terminal 6 via an HDMI (registered trademark) cable. An SPDIF signal is input from the television 100 to the digital signal input terminal 6. The DIR 7 converts the SPDIF signal input from the television 100 into an I2S signal. The converted I2S signal is output to DSP8. The DSP 8 performs digital signal processing such as equalizer processing on the I2S signal. The I2S signal that has undergone digital signal processing is output to the DAC9. The DAC 9 D / A converts the I2S signal into an analog audio signal. The D / A converted analog audio signal is output to the volume adjusting unit 10.

The volume adjusting unit 10 adjusts the volume value of the analog audio signal. The analog audio signal whose volume value has been adjusted is output to the amplification unit 11. The amplification unit 11 amplifies the analog audio signal whose volume value has been adjusted. The amplified analog audio signal is output to the speaker terminal 12. A speaker 200 is connected to the speaker terminal 12. The speaker 200 outputs audio based on the analog audio signal.

The control unit 2 executes the eARC discovery operation (initial connection sequence) when the hot plug of the television 100 changes from a low level to a high level. Further, when the control unit 2 executes the discovery operation regardless of the hot-plug change of the television 100 (when the on / off setting of the eARC function is changed, etc.), the HDMI (registered trademark) TX power supply line (5V) is connected. , From low level to high level. Specifically, the control unit 2 executes a low-high operation of setting the power supply line connected to the television 100 to a low level for a predetermined time (for example, “a” msec) and then setting it to a high level.

The control unit 2 executes a low-high operation in which the power supply line is set to a low level for a predetermined time of "a" msec, and then when the hot plug of the television 100 changes from a low level to a high level, the eARC function discovery operation (initial). Connection sequence) is executed. The control unit 2 executes the discovery operation of the eARC function, and when it recognizes that the television 100 supports the eARC function, outputs sound from the speaker 200. That is, the control unit 2 outputs audio by eARC.

When the hot plug of the television 100 does not change from the low level to the high level after executing the low-high operation in which the power supply line is set to the low level for a predetermined time "a" msec, the control unit 2 has a predetermined time "a". To perform a low-high operation. Specifically, the control unit 2 increases the predetermined time "a" msec to "b" msec and executes the low-high operation. For example, "b" = 2 "a".

When the hot plug of the sink device does not change from the low level to the high level when the low-high operation is executed, the control unit 2 changes "a" for a predetermined time to execute the low-high operation. Run until the TV 100 hot-plug changes from low level to high level. For example, the control unit 2 sets the period for lowering the power supply line to the low level for a predetermined time "a" msec, and if there is no change in the hot plug of the television 100, next sets the period for lowering the power supply line to the low level for "a" msec. b ”(= 2“ a ”) msec. Even in this case, if there is no change in the hot plug of the television 100, the period for lowering the power supply line is set to "c" (= 4 "a") msec.

Hereinafter, the processing operation of the AV receiver 1 will be described with reference to the flowchart shown in FIG. The control unit 2 first determines whether or not to change the eARC setting (eARC setting: from on to off) (S1). The control unit 2 executes the process of S1 while it is determined that the eARC setting is not changed (S1: No). When the control unit 2 determines that the eARC setting is to be changed (S1: Yes), the control unit 2 performs a low-high operation of setting the power supply line (5V) to a low level and then setting it to a high level (S2).

Next, the control unit 2 determines whether or not the hot plug of the television 100 has changed (S3). When the control unit 2 determines that the hot plug of the television 100 has not changed (S3: No), the control unit 2 changes the period during which the power supply line (5V) is set to the low level (previous value + α) (S4). Next, the control unit 2 executes the process of S2. On the other hand, when the control unit 2 determines that the hot plug of the television 100 has changed (S3: Yes), the control unit 2 executes the eARC discovery operation (S5).

As described above, in the present embodiment, when the control unit 2 executes a low-high operation of setting the power supply line connected to the television 100 (sink device) to a low level for a predetermined time and then setting it to a high level. When the hot plug of the television 100 (sink device) does not change from low level to high level, the low high operation is executed by changing (for example, increasing) a predetermined time. As a result, for example, even if the hot plug does not change for a predetermined time during the low level of the power supply line, there is a high possibility that the hot plug will change due to the low level after the change. Therefore, it is possible to solve the problem that the sound by eARC is not output.

Although the embodiments of the present invention have been described above, the embodiments to which the present invention can be applied are not limited to the above-described embodiments, and as illustrated below, they are appropriately used without departing from the spirit of the present invention. It is possible to make changes.

In the above-described embodiment, the control unit 2 sets the power supply line connected to the TV 100 (sink device) to a low level for a predetermined time, and then executes a low-high operation to set the high level to the TV 100 (sink device). When the hot plug of the sink device) does not change from the low level to the high level, the low-high operation is executed by increasing the predetermined time. Not limited to this, the control unit 2 may be configured to execute the low-high operation by reducing the predetermined time. In this case, the predetermined time for the first low level is set to a sufficiently long time.

In the above-described embodiment, an AV receiver to which a speaker is separately connected is exemplified as an audio processing device. Not limited to this, for example, another voice processing device such as a bar type speaker device in which the speaker is integrally configured with the amplification unit may be used.

INDUSTRIAL APPLICABILITY The present invention can be suitably adopted for a voice processing device that performs voice processing such as amplification on a voice signal.

1 AV receiver (voice processing device, repeater device)
2 Control unit 100 TV (sink device)
200 speakers

Claims (4)

An audio processing device having an eARC function that outputs an audio signal input from a sink device to a speaker.
Equipped with a control unit
The control unit
After the power line connected to the sink device is set to the low level for a predetermined time, the low-high operation to set the high level is executed.
When the hot plug of the sink device changes from the low level to the high level when the low-high operation is executed, the discovery operation of the eARC function is executed.
When the low-high operation is executed and the hot plug of the sink device does not change from the low level to the high level, the voice processing is characterized in that the low-high operation is executed by changing the predetermined time. Device. The control unit
When the hot plug of the sink device does not change from the low level to the high level when the low-high operation is executed, the operation of executing the low-high operation by changing the predetermined time is performed by the sink device. The voice processing apparatus according to claim 1, wherein the hot plug is executed from a low level to a high level. The control unit
The claim is characterized in that when the low-high operation is executed and the hot plug of the sink device does not change from the low level to the high level, the predetermined time is increased to execute the low-high operation. The voice processing apparatus according to 1 or 2. The control unit
One of claims 1 to 3, wherein when the discovery operation of the eARC function is executed and the sink device recognizes that the eARC function is supported, audio is output from the speaker. The voice processing device described in.

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