Patents by Inventor Sua Neo

Sua Neo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080071549
    Abstract: In the conventional art inventions for coding multi-channel audio signals, three of the major processes involved are: generation of a reverberation signal using an all-pass filter; segmentation of a signal in the time and frequency domains for the purpose of level adjustment; and mixing of a coded binaural signal with an original signal coded up to a fixed crossover frequency. These processes pose the problems mentioned in the present invention. The present invention proposes the following three embodiments: to control the extent of reverberations by dynamically adjusting all-pass filter coefficients with the inter-channel coherence cues; to segment a signal in the time domain finely in the lower frequency region and coarsely in the higher frequency region; and to control a crossover frequency used for mixing based on a bit rate, and if the original signal is coarsely quantized, to mix a downmix signal with an original signal in proportions determined by an inter-channel coherence cue.
    Type: Application
    Filed: June 28, 2005
    Publication date: March 20, 2008
    Inventors: Kok Chong, Naoya Tanaka, Sua Neo, Mineo Tsushima
  • Publication number: 20070233470
    Abstract: Multichannel signal coding equipment is provided for presenting a high quality sound at a low bit rate. In the multichannel signal coding equipment (2), a down mixpart (10) generates monaural reference channel signals for N number of channel signals. A coding part (11) codes the generated reference channel signal. A signal analyzing part (12) extracts parameters indicating characteristics of each of the N number of channel signals. An MUX part (13) multiplexes the coded reference channel signal with the extracted parameters.
    Type: Application
    Filed: August 24, 2005
    Publication date: October 4, 2007
    Inventors: Michiyo Goto, Chun Teo, Sua Neo, Koji Yoshida
  • Publication number: 20070198254
    Abstract: The conventional error conceal processing generates a greatly fluctuating irregular sound which is unpleasant to ears and causes a remarkable echo effect and click noise. A notification signal detection unit (301) judges processing for an input frame. In case of an error frame, a sound detection unit (303) makes judgment whether a preceding non-error data frame is a sound signal. If it is a sound frame, a sound copying unit (304) generates a replacing frame. If it is a non-sound frame, a transient signal detection unit (305) judges whether it is an attack signal by the transient signal detection and selects an appropriate area from the preceding non-error frame.
    Type: Application
    Filed: March 1, 2005
    Publication date: August 23, 2007
    Inventors: Michiyo Goto, Chun Teo, Sua Neo, Koji Yoshida
  • Publication number: 20060256971
    Abstract: A frame type for a current SBR frame is determined according to a type of end border of a previous frame, as well as presence of a transient in the current SBR frame. A start border is determined according to the end border of the previous SBR frame. For a FIXFIX frame, a low time-resolution setting is used. For a FIXVAR or a VARVAR frame, a search for intermediate borders is conducted in the region between the transient and maximum allowed end border location. The end border is also determined at this stage. If there is excess capacity for more borders, another search is conducted in the region between the transient and the start border. For a VARFIX frame, only one search needs to be conducted, in the whole region partitioned by a variable start border and a fixed end border. All of the above are accomplished with two Forward Search operations and one Backward Search operation.
    Type: Application
    Filed: October 4, 2004
    Publication date: November 16, 2006
    Inventors: Kok Chong, Sua Neo, Naoya Tanaka, Takeshi Norimatsu
  • Publication number: 20060021494
    Abstract: This method and apparatus extract symbolic high-level musical structure resembling that of a music score. Humming or the like is converted with this invention into a sequence of notes that represent the melody that the user (usually human, but potentially animal) is trying to express. These retrieved notes each contain information such as a pitch, the start time and duration and the series contains the relative order of each note. A possible application of the invention is a music retrieval system whereby humming forms the query to some search engine.
    Type: Application
    Filed: September 25, 2003
    Publication date: February 2, 2006
    Inventors: Kok Teo, Kok Chong, Sua Neo
  • Publication number: 20050171785
    Abstract: An energy corrector (105) for correcting a target energy for high-frequency components and a corrective coefficient calculator (106) for calculating an energy corrective coefficient from low-frequency subband signals are newly provided. These processors perform a process for correcting a target energy that is required when a band expanding process is performed on a real number only. Thus, a real subband combining filter and a real band expander which require a smaller amount of calculations can be used instead of a complex subband combining filter and a complex band expander, while maintaining a high sound-quality level, and the required amount of calculations and the apparatus scale can be reduced.
    Type: Application
    Filed: June 24, 2003
    Publication date: August 4, 2005
    Inventors: Toshiyuki Nomura, Osamu Shimada, Yuichiro Takamizawa, Masahiro Serizawa, Naoya Tanaka, Mineo Tsushima, Takeshi Norimatsu, Kok Chong, Kim Kuah, Sua Neo
  • Publication number: 20050080621
    Abstract: A wideband, high quality audio signal is decoded with few calculations at a low bitrate. Unwanted spectrum components accompanying sinusoidal signal injection by a synthesis subband filter built with real-value operations are suppressed by inserting a suppression signal to subbands adjacent to the subband to which the sine wave is injected. This makes it possible to inject a desired sinusoid with few calculations.
    Type: Application
    Filed: July 30, 2003
    Publication date: April 14, 2005
    Inventors: Mineo Tsushima, Naoya Tanaka, Takeshi Norimatsu, Kok Chong, Kim Kuah, Sua Neo, Toshiyuki Nomura, Osamu Shimada, Yuichiro Takamizawa, Masahiro Serizawa