公开(公告)号：WO1996019076A1

公开(公告)日：1996-06-20

申请号：PCT/US1995015619

申请日：1995-12-14

Applicant: CIRRUS LOGIC, INC.

Inventor： CIRRUS LOGIC, INC. ,  DAUM, Daniel ,  ROSENAU, Mark, A. ,  ORT, Jeffrey, G. ,  CHANG, Richard ,  SUNG, Chih-Ta ,  CHAN, Tzoyao

IPC: H04N05/76

CPC classification number: H04N9/8063 ,  G09G5/393 ,  G11B20/00007 ,  G11B20/10527 ,  G11B27/10 ,  G11B27/105 ,  G11B27/3027 ,  G11B27/3036 ,  G11B2220/213 ,  G11B2220/2545 ,  H04N5/775 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/8216 ,  H04N9/87 ,  H04N19/132 ,  H04N19/42 ,  H04N19/423 ,  H04N19/427 ,  H04N19/587 ,  H04N19/61 ,  H04N21/4143 ,  H04N21/4305 ,  H04N21/4307 ,  H04N21/4341

Abstract: A multimedia system including an integrated system (600) and video decoder (619) with an audio/video synchronization circuit (620) for substantially synchronizing the display of video images with audio playback. In addition, a step control is provided to allow for viewing of video images on a frame-by-frame basis or to freeze or play video in slow motion. When step control is activated, audio output is muted. Audio data corresponding to displayed video is transmitted to the muted audio decoder. An internal system clock (401) may be suppressed to the system clock counter (411). An external CPU (820) may provide system clock start times corresponding to video frames to be displayed. The external CPU (820) may increment the system clock counter (411) by an amount corresponding to the difference between a successive frame or number of frames.

Abstract translation: 一种包括具有音频/视频同步电路（620）的集成系统（600）和视频解码器（619）的多媒体系统，用于使视频图像的显示与音频播放基本上同步。 此外，提供步进控制以允许逐帧观看视频图像或者以慢动作冻结或播放视频。 当步进控制被激活时，音频输出静音。 对应于显示的视频的音频数据被发送到静音音频解码器。 可以将内部系统时钟（401）抑制到系统时钟计数器（411）。 外部CPU（820）可以提供与要显示的视频帧相对应的系统时钟开始时间。 外部CPU（820）可以将系统时钟计数器（411）递增与连续帧或帧数之间的差相对应的量。

公开(公告)号：WO1996019078A1

公开(公告)日：1996-06-20

申请号：PCT/US1995015618

申请日：1995-12-14

Applicant: CIRRUS LOGIC, INC.

Inventor： CIRRUS LOGIC, INC. ,  ROSENAU, Mark, A. ,  SARTAIN, Daryl ,  DAUM, Daniel ,  ORT, Jeffrey, G.

IPC: H04N07/12

CPC classification number: H04N9/8216 ,  G09G5/393 ,  G11B20/00007 ,  G11B20/10527 ,  G11B27/10 ,  G11B27/105 ,  G11B27/3027 ,  G11B27/3036 ,  G11B2220/213 ,  G11B2220/2545 ,  H04N5/775 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/8063 ,  H04N9/87 ,  H04N19/132 ,  H04N19/42 ,  H04N19/423 ,  H04N19/427 ,  H04N19/587 ,  H04N19/61 ,  H04N21/4143 ,  H04N21/4305 ,  H04N21/4307

Abstract: A multimedia system includes an integrated system and video decoder with an audio/video synchronization circuit (200) for substantially synchronizing the display of video images with audio playback. An audio presentation time stamp (APTS) (415) is detected in the compressed/coded audio data stream in the integrated system and video decoder and stored in a data latch (442). The compressed/coded audio data stream is fed to an audio decoder which decodes/decompresses the audio data and outputs an audio signal. The audio decoder detects when audio data corresponding to an APTS (415) had been output and sets a corresponding flag (213). The flag (213) indicates to the integrated system and video decoder that a corresponding audio segment had been decoded/decompressed and output. The integrated system and video decoder then synchronizes the video output with the audio output by repeating or skipping frames of video data.

Abstract translation: 多媒体系统包括具有音频/视频同步电路（200）的集成系统和视频解码器，用于使视频图像的显示与音频回放基本上同步。 音频呈现时间戳（APTS）（415）在集成系统和视频解码器中的压缩/编码音频数据流中被检测并存储在数据锁存器（442）中。 压缩/编码的音频数据流被馈送到音频解码器，音频解码器解码/解压缩音频数据并输出音频信号。 音频解码器检测与APTS（415）相对应的音频数据是否已被输出并设置相应的标志（213）。 标志（213）向集成系统和视频解码器指示对应的音频片段已被解码/解压缩并输出。 然后，集成系统和视频解码器通过重复或跳过视频数据帧来同步视频输出与音频输出。

公开(公告)号：EP0797893A1

公开(公告)日：1997-10-01

申请号：EP95944049.0

申请日：1995-12-14

Applicant: CIRRUS LOGIC, INC.

Inventor： ROSENAU, Mark, A. ,  SARTAIN, Daryl ,  DAUM, Daniel ,  ORT, Jeffrey, G.

IPC: G06F3 ,  G06T9 ,  G09G5 ,  G10K15 ,  G11B20 ,  G11B27 ,  H04N7 ,  H04N9 ,  H04N5

CPC classification number: H04N9/8216 ,  G09G5/393 ,  G11B20/00007 ,  G11B20/10527 ,  G11B27/10 ,  G11B27/105 ,  G11B27/3027 ,  G11B27/3036 ,  G11B2220/213 ,  G11B2220/2545 ,  H04N5/775 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/8063 ,  H04N9/87 ,  H04N19/132 ,  H04N19/42 ,  H04N19/423 ,  H04N19/427 ,  H04N19/587 ,  H04N19/61 ,  H04N21/4143 ,  H04N21/4305 ,  H04N21/4307

Abstract: A multimedia system includes an integrated system and video decoder with an audio/video synchronization circuit (200) for substantially synchronizing the display of video images with audio playback. An audio presentation time stamp (APTS) (415) is detected in the compressed/coded audio data stream in the integrated system and video decoder and stored in a data latch (442). The compressed/coded audio data stream is fed to an audio decoder which decodes/decompresses the audio data and outputs an audio signal. The audio decoder detects when audio data corresponding to an APTS (415) had been output and sets a corresponding flag (213). The flag (213) indicates to the integrated system and video decoder that a corresponding audio segment had been decoded/decompressed and output. The integrated system and video decoder then synchronizes the video output with the audio output by repeating or skipping frames of video data.

公开(公告)号：EP0797891A1

公开(公告)日：1997-10-01

申请号：EP95942963.0

申请日：1995-12-14

Applicant: CIRRUS LOGIC, INC.

Inventor： DAUM, Daniel ,  ROSENAU, Mark, A. ,  ORT, Jeffrey, G. ,  CHANG, Richard ,  SUNG, Chih-Ta ,  CHAN, Tzoyao

IPC: G06F3 ,  G06T9 ,  G09G5 ,  G10K15 ,  G11B20 ,  G11B27 ,  H04N7 ,  H04N9 ,  H04N5

CPC classification number: H04N9/8063 ,  G09G5/393 ,  G11B20/00007 ,  G11B20/10527 ,  G11B27/10 ,  G11B27/105 ,  G11B27/3027 ,  G11B27/3036 ,  G11B2220/213 ,  G11B2220/2545 ,  H04N5/775 ,  H04N5/85 ,  H04N9/8042 ,  H04N9/8216 ,  H04N9/87 ,  H04N19/132 ,  H04N19/42 ,  H04N19/423 ,  H04N19/427 ,  H04N19/587 ,  H04N19/61 ,  H04N21/4143 ,  H04N21/4305 ,  H04N21/4307 ,  H04N21/4341

Abstract: A multimedia system including an integrated system (600) and video decoder (619) with an audio/video synchronization circuit (620) for substantially synchronizing the display of video images with audio playback. In addition, a step control is provided to allow for viewing of video images on a frame-by-frame basis or to freeze or play video in slow motion. When step control is activated, audio output is muted. Audio data corresponding to displayed video is transmitted to the muted audio decoder. An internal system clock (401) may be suppressed to the system clock counter (411). An external CPU (820) may provide system clock start times corresponding to video frames to be displayed. The external CPU (820) may increment the system clock counter (411) by an amount corresponding to the difference between a successive frame or number of frames.