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 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:
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.
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:
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.
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 an audio processing method for hearing protection in an ambient environment, includes steps of: sampling digital audio signals decoded to obtain a plurality of amplitude values of the digital audio signals; obtaining a default gain value; calculating an actual audio energy of the digital audio signals sampled during a predetermined period time according to the amplitude values sampled in the predetermined period time and the default gain value; collecting ambient noises to calculate an ambient noise level; obtaining a reference audio energy according to the ambient noise level; comparing the actual audio energy with the reference audio energy; and generating a hearing protection signal if the actual audio energy reaches the reference audio energy, whereby protecting users' hearing. The present invention also provides a corresponding audio processing apparatus.
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:
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.