Selecting discard packets in receiver for voice over packet network

An apparatus comprising:

• a buffer to receive and store a sequence of data packets that represents a voice signal;
• a decoder coupled to the buffer to receive the sequence of data packets and to convert the sequence of data packets to an audio output signal;
• an automatic level control (ALC) component coupled to the decoder to:
• selectively apply a gain adjustment to the audio output signal;
• detect that one of the received packets is a silence packet or a noise packet;
• generate a signal or signals to indicate that the one of the received packets is a silence packet or a noise packet;
• determine whether dropping of the one of the received packets is urgently needed, wherein the determine includes whether a pre-determined period has timed out without the dropping of the one of the received packets since the one of the received packets was determined that dropping the one of the received packets was necessary;
• and a jitter delay control circuit coupled to the ALC component and to the buffer to receive the signal or signals generated by the ALC component and to selectively drop the one of the received packets in response to the signal or signals received from the ALC component;
• wherein said automatic level control component includes a gain adjustment block and a level estimation and active voice detector block, said gain adjustment block controlled by the level estimation and active voice detector block to adjust a gain applied by the gain adjustment block to the audio output signal, said level estimation and active voice detector block of said automatic level control component being used to detect that one of the received packets is a silence packet or a noise packet.

A system comprising:

• a receiver to receive a sequence of data packets that represents a voice signal;
• and a speaker coupled to the receiver to audibly reproduce the voice signal;
• wherein the receiver includes:
• a buffer to receive and store the sequence of data packets;
• and a decoder coupled to the buffer to receive the sequence of data packets and to convert the sequence of data packets to an audio output signal;
• an automatic level control (ALC) component coupled to the decoder to:
• selectively apply a gain adjustment to the audio output signal;
• detect that one of the received packets is a silence packet or a noise packet;
• generate a signal or signals to indicate that the one of the received packets is a silence packet or a noise packet;
• determine whether dropping of the one of the received packets is urgently needed, wherein the determine includes whether a pre-determined period has timed out without the dropping of the one of the received packets since the one of the received packets was determined that dropping the one of the received packets was necessary;
• and a jitter delay control circuit coupled to the ALC component and to the buffer to receive the signal or signals generated by the ALC component and to selectively drop the one of the received packets in response to the signal or signals received from the ALC component;
• wherein said automatic level control component includes a gain adjustment block and a level estimation and active voice detector block, said gain adjustment block controlled by the level estimation and active voice detector block to adjust a gain applied by the gain adjustment block to the audio output signal, said level estimation and active voice detector block of said automatic level control component being used to detect that one of the received packets is a silence packet or a noise packet.