Qualcomm Incorporated

Other

Johnny Kallacheril John

Nikolai Konrad Leung

Gilbert Christopher Sih

Nikolai K N Leung

Matthew Stuart Grob

Samir Kumar Gupta

Eddie L T Choy

Thomas Wilborn

Nidish Ramachandra Kamath

Juan Faus

Ram Krishnan

Heejong Yoo

Andrew P DeJaco

Power savings in a mobile device is accomplished by generating audio samples by decoding a bitstream with a decoding system within the mobile device. The generated audio samples are transferred into at least one memory bank in a set of memory banks in a power saver block within the mobile device. Parts of the decoding system not involved in the storing of the generated audio samples are switched off after batch decoding a bitstream associated with multiple audio frames. The bitstream includes bits less than that found in one audio file. At least one of the memory banks in the set of memory banks is power collapsible. The fetching of the decoded by the decoding system can be synchronized with a paging channel of a modem in the mobile device. The transferred audio samples is a lossless compression and may occur after a re-encoding.

Power efficient batch-frame audio decoding apparatus, system and method

Techniques for performing data tracing in an integrated circuit with multiple embedded memories are described. A trace module within the integrated circuit forms packets of trace data for memory accesses of the multiple memories. The trace module includes multiple data capture units (one for each memory) and a trace stream generator. Each data capture unit includes a register, a comparator, an address compressor, a data compressor, and a packetizer. The register stores an address for a prior memory access of the associated memory. The comparator compares an address for a current memory access against the address stored in the register. The address and data compressors perform address and data compression, respectively, for the current memory access. The packetizer forms a packet of trace data for the current memory access. The trace stream generator generates a stream containing trace data packets from all data capture units.

Compression of data traces for an integrated circuit with multiple memories

Techniques for debugging a multicore system with synchronous stop and resume capabilities are described. In one design, an apparatus (e.g., an ASIC) includes first and second processing cores. During debugging, the first or second processing core receives a software command to stop operation and generates a first hardware signal indicating the stop. The other processing core receives the first hardware signal and stops operation. Both processing cores stop at approximately the same time based on the first hardware signal. Thereafter, the first or second processing core receives another software command to resume operation and generates a second hardware signal indicating resumption of operation. The other processing core receives the second hardware signal and resumes operation. Both processing cores resume at approximately the same time based on the second hardware signal. The first and second hardware signals may come from the same or different processing cores.

Method and apparatus for debugging a multicore system

A method of signal reception according to one embodiment of the invention includes receiving a set of data values over a first frequency band during a first time slot, and receiving another set of data values over the first frequency band during a second time slot which is after the first time slot. Between the first and second time slots, the method includes sampling a signal received over a second frequency band and storing the samples. Based on the samples, a received signal quality value is calculated.

Method, apparatus, and system for receiving data on a first frequency band and observing a second frequency band

A novel and improved method and apparatus for providing an interface to a digital wireless telephone system compatible with standard analog wire line fax machines is described. To process a fax, a source interface waits until an interface to a destination fax machine has been established before establishing an interface to a source fax machine. The source fax transmission rate must be less than or equal to the destination fax transmission rate and the data rate of the digital channel. To establish the source fax interface at the proper rate, the source interface first selects and initial data rate from a set of standard fax transmission rates. The source interface sends unacceptable rate (failure to train) messages to the source fax machine until the source fax transmission rate is less than or equal to the data channel rate and the destination fax transmission rate. During fax processing, the destination interface inserts non-printing data (fill bits) if the destination fax transmission rate is greater than the source fax transmission rate. Fill bits are also inserted to compensate for transmission delays.

Digital network interface for analog fax equipment

A switch (212) is included in a wireless terminal (206). Different settings of the switch cause a processor (210) in the wireless terminal to use different device algorithms. The switch itself is set by applying a code signal to the wireless terminal through its RJ-11 interface (208). The code is a sequence of Dual Tone Multiple Frequency (DTMF) tones, which may conveniently be provided by an ordinary telephone (214), or by a computer modem (204). A single wireless terminal may therefore be reconfigured on demand to interface with any of a variety of devices (202), (214).

Configuring wireless terminal

A novel and improved method and apparatus for providing an interface to a digital wireless telephone system compatible with standard analog wire line telephones and analog wire line fax machines is disclosed. During a telephone call, a fax detector monitors the incoming data for fax signals. If a fax is detected, the data processor switches from processing the data as if it were voice to processing it as fax In addition, the remote station is sent a signal notifying it to process the data as fax rather than voice. The fax detector operates by detecting the preamble of a V.21 message, present at the beginning of every fax call. Energy is measured in both frequencies of the BFSK signals. A decision is made by analyzing these energies and locating a specific pattern which repeats itself a sufficient number of times.

Method and apparatus for detecting facsimile transmission

A method and apparatus to facilitate service negotiation by a digital telecommunications system that allows a low activity communication to be transmitted by the system over vocoded channels. In one embodiment, once the telecommunication system is noticed that a low activity signal needs to be transmitted, each telecommunication system vocoder involved in the transmission automatically locks into full rate, and where applicable, adjusts the transmission power to reduce frame error rate. Further, the telecommunications system may include any number of wireless links. The invention includes a noticing apparatus coupled to a sensor that receives a low activity communication device attachment and notices the digital telecommunications system that a low activity communication is being initiated or discontinued.

Method and apparatus for establishing TDD/TTY service over vocoded channels

In a half-duplex communication system in which additional delays in the communication channel may cause a message collision between a message and a response, a timer based collision prevention circuit is utilized to prevent the message collision. The collision prevention circuit determines if the message transmitted by a communication device will be repeated. If the message is to be repeated, the collision prevention circuit sets a countdown collision timer to a predetermined period of time shorter than the shortest repetition interval of the repeated message. A response is only sent to the communication device if the collision timer has not expired. If the timer expires, the collision prevention circuit waits for the message to be retransmitted by the source device before sending the response to the communication device.

Method and apparatus for preventing message collisions in a half-duplex

A novel and improved method and apparatus for providing an interface to a digital wireless telephone system compatible with standard analog wire line telephones and analog wire line fax machines is disclosed. During a telephone call, a fax detector monitors the incoming data for fax signals. If a fax is detected, the data processor switches from processing the data as if it were voice to processing it as fax. In addition, the remote station is sent a signal notifying it to process the data as fax rather than voice. The fax detector operates by detecting the preamble of a V.21 message, present at the beginning of every fax call. Energy is measured in both frequencies of the BFSK signals. A decision is made by analyzing these energies and locating a specific pattern which repeats itself a sufficient number of times.

A novel and improved method and apparatus for providing an interface to a digital wireless telephone system compatible with standard analog wire line telephones, analog wire line fax machines, and computer modems is described. At the start of a telephone call, a data pump interprets the digits dialed, and if a first set of digits are received a control system configures the data pump for processing analog fax data. If a second set of digits are received, the control system configures the data pump for processing analog computer modem data. If a telephone number is received, the control system configures the interface system to pass additional data to a vocoder which encodes any digitized audio information received.

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San Diego, CA, United States of America

Johnny Kallacheril John