Synchronizing a modem and vocoder of a mobile station
First Claim
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1. A method for use with a mobile station having a vocoder and a modem, comprising:
- determining a data level of a first buffer responsive to the modem reaching a predetermined position of a data frame sequence; and
synchronizing the vocoder and the modem based on the determined data level of the first buffer.
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Abstract
In one embodiment, the present invention includes a method for determining a level of a buffer that stores data samples. The level may be determined at a predetermined position of a data frame sequence. Based on the level of the buffer at this position, a vocoder and modem of a mobile station may be synchronized. One or both of the vocoder and modem may be adjusted to attain the synchronization. Thus a rate mismatch between the vocoder and modem may be resolved.
13 Citations
21 Claims
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1. A method for use with a mobile station having a vocoder and a modem, comprising:
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determining a data level of a first buffer responsive to the modem reaching a predetermined position of a data frame sequence; and synchronizing the vocoder and the modem based on the determined data level of the first buffer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
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a first buffer to store a speech block; a vocoder coupled to the buffer to encode the speech block; and a modem coupled to the vocoder to modulate the encoded speech block, wherein at least the vocoder is controlled to maintain the modem and the vocoder in substantial synchronization based on a level of the first buffer, the level determined responsive to the modem reaching a predetermined position of a data frame sequence. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A mobile station comprising:
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an input device to receive voice information from a user and convert the voice information to an analog signal; an analog-to-digital converter (ADC) coupled to the input device, the ADC to convert the analog signal into digitized speech data; a first buffer coupled to ADC to store the digitized speech data; a digital signal processor (DSP) coupled to the first buffer, the DSP to encode the digitized speech data into encoded digitized speech data, to modulate the encoded digitized speech data into modulated encoded digitized speech data and to synchronize the encoding and the modulation based on a level of the first buffer, the level of the first buffer determined responsive to the modulation reaching a predetermined position of a data sequence; radio frequency (RF) circuitry coupled to the DSP; and an antenna coupled to the RF circuitry. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification