摘要:
The present invention provides an audio processing apparatus for automatically controlling gain. The audio processing apparatus includes an audio signal source and a sound reproduction device. The sound reproduction device attaches to the audio signal source, which includes a storage unit for storing a default gain value and a gain index table. The gain index table lists genre types with a genre gain value of each of the genre types. After receiving a play command signal, the audio signal source fetches an audio file to be played, reads a genre type of the audio file from a tag thereof, and processing the audio file to generate audio signals. The audio signal source further reads a genre gain value of the genre type from the gain index table, amplifies the audio signals by the genre gain value, and sends the amplified audio signals to the sound reproduction device to reproduce corresponding sounds.
摘要:
The present invention relates to an audio processing system and method for automatically adjusting volume. The method includes steps of: calculating a noise level as a reference noise level; periodically calculating a new noise level of a predetermined time period, and dividing the reference noise level by the new noise level to obtain a ratio; sampling digital audio signals generated by a decoding unit to obtain a plurality of amplitude values, periodically calculating an audio energy value of the predetermined time period; multiplying the audio energy value by the ratio to obtain a reference audio energy value; calculating a gain value according to the reference audio energy value and the default gain value; updating the default gain value with the gain value; and signaling the gain amplifier to amplify the analog audio signals received with the gain value, thereby protecting users' hearing.
摘要:
The present invention relates to a method for hearing protection in an ambient environment of a sound reproduction device, includes steps of: receiving analog audio signals from an audio signal source via a connector; converting the analog audio signals to digital audio signals; sampling the digital audio signals to obtain a plurality of sampled amplitude values; computing an actual audio energy of the digital audio signals within a predetermined time period setting the sampled amplitude values sampled within the predetermined time period as parameters; collecting ambient noises to compute a noise level; obtaining an audio reference energy according to the noise level; comparing the actual audio energy with the audio reference energy; generating a hearing protect signal if the actual audio energy reaches the audio reference energy; and changing a current gain value or emitting reminding information, thus, protecting listeners' hearing. The present invention further provides a corresponding sound reproduction device.
摘要:
A mute processing method used in a multi-person communication system is provided. The method is capable of automatically sending mute frames when there are no sound inputs from terminals of the multi-person communication system. The method includes the steps of: collecting input signals from a microphone; calculating an energy level of the input signals within a present time span; obtaining a maximum amplitude of the input signals within the present time span; sending a mute frame if the energy level and the maximum amplitude of the input signals within the present time span are respectively less than a predetermined energy level and a predetermined amplitude, otherwise, coding the input signals within the present time span; and outputting the mute frame or coded signals. A related apparatus is also provided.
摘要:
The present invention relates to an audio processing system with function of automatic gain control and method thereof. The method includes steps of: receiving a playing command to play an audio file; reading a genre type of the audio file from a tag of the audio file; reading a genre gain value of the genre type from a gain setting table stored in a storage unit; decoding the audio file and generating digital audio signals; converting the digital audio signals to analog audio signals; and signaling a gain amplifier to amplify the analog audio signals by the genre gain value, thereby sounds corresponding to the analog audio signals amplified is proper to a listener's hearing.
摘要:
An audio test apparatus, and an exemplary audio test method that includes: processing an audio file through two independent channels; outputting no signals from a left channel and from a right channel in a first time period; receiving noise signals from the left and right channels; outputting single-frequency signals from the left channel only in a second time period; receiving the single-frequency signals from the left channel and crosstalk signals from the right channel; outputting multi-frequency signals from the left and right channels in a third time period; receiving the multi-frequency signals from the left and right channels; outputting single-frequency signals from the right channel only in a fourth time period; receiving the crosstalk signals from the left channel and the single-frequency signals from the right channel; and testing parameters according to the signals received during the four time periods.
摘要:
The present invention provides an audio processing apparatus for automatically controlling gain. The audio processing apparatus includes an audio signal source and a sound reproduction device. The sound reproduction device attaches to the audio signal source, which includes a storage unit for storing a default gain value and a gain index table. The gain index table lists genre types with a genre gain value of each of the genre types. After receiving a play command signal, the audio signal source fetches an audio file to be played, reads a genre type of the audio file from a tag thereof, and processing the audio file to generate audio signals. The audio signal source further reads a genre gain value of the genre type from the gain index table, amplifies the audio signals by the genre gain value, and sends the amplified audio signals to the sound reproduction device to reproduce corresponding sounds.
摘要:
A mute processing method used in a multi-person communication system is provided. The method is capable of automatically sending mute frames when there are no sound inputs from terminals of the multi-person communication system. The method includes the steps of: collecting input signals from a microphone; obtaining a maximum amplitude of the input signals within a present time span; sending a mute frame if each maximum amplitude of the input signals within each of previous continuous time spans is less than a predetermined amplitude and the maximum amplitude of the input signals within the present time span is still less than the predetermined amplitude, otherwise, coding the input signals within the present time span; and outputting the mute frame or coded signals. A related apparatus is also provided.
摘要:
The present invention provides an audio processing system with function of automatic gain control and method thereof. The method includes steps of: adjusting the default gain value to an adjusted gain value in response to a gain adjusting command; signaling a gain amplifier to amplify analog audio signals received from a digital/analog converter by the adjusted gain value; updating the default gain value with the adjusted gain value; updating the time period corresponding to a new current time thereby yielding an updated time period; reading a predetermined gain value referenced by the updated time period; calculating an integrated gain value according to the predetermined gain value referenced by the updated time period and the adjusted gain value; and updating the predetermined gain value referenced by the updated time period with the integrated gain value, thereby audio energy of the analog audio signals amplified is proper to a user's hearing.
摘要:
The present invention relates to method for managing gain value for each channel of a TV set, includes steps: signaling a tuner to receive broadcasting signals of the channel in response to a channel selection command; reading a predetermined gain value of the channel from a setting table; amplifying and outputting audio signals extracted from the broadcasting signals of the channel according to the predetermined gain value of the channel; signaling a gain control unit to adjust a current gain value to an adjusted gain value if receiving a gain adjustment command; amplifying the audio signals of the channel according to the adjusted gain value; calculating an integrated gain value according to the adjusted gain value and the predetermined gain value; and updating the predetermined gain value of the channel using the integrated gain value. The present invention also provides a corresponding TV set.